[ Task
    { taskDirectness = Direct
    , taskHypotheses =
        [
            ( Marker "union_defn"
            , Quantified Universally
                ( Scope
                    ( Connected Equivalence
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            ]
                        )
                        ( Connected Disjunction
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                ]
                            )
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            )
                        )
                    )
                )
            )
        ,
            ( Marker "ext"
            , Quantified Universally
                ( Scope
                    ( Connected Implication
                        ( Quantified Universally
                            ( Scope
                                ( Connected Equivalence
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "A" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "B" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                )
                            )
                        )
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Symbol "=" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            ]
                        )
                    )
                )
            )
        ]
    , taskConjectureLabel = Marker "union_comm"
    , taskConjecture = TermSymbol
        ( SymbolPredicate
            ( PredicateRelation
                ( Symbol "=" )
            )
        )
        [ TermSymbol
            ( SymbolMixfix
                [ Nothing
                , Just
                    ( Command "union" )
                , Nothing
                ]
            )
            [ TermVar
                ( NamedVar "A" )
            , TermVar
                ( NamedVar "B" )
            ]
        , TermSymbol
            ( SymbolMixfix
                [ Nothing
                , Just
                    ( Command "union" )
                , Nothing
                ]
            )
            [ TermVar
                ( NamedVar "B" )
            , TermVar
                ( NamedVar "A" )
            ]
        ]
    }
, Task
    { taskDirectness = Direct
    , taskHypotheses =
        [
            ( Marker "union_comm"
            , Quantified Universally
                ( Scope
                    ( TermSymbol
                        ( SymbolPredicate
                            ( PredicateRelation
                                ( Symbol "=" )
                            )
                        )
                        [ TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            ]
                        , TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            ]
                        ]
                    )
                )
            )
        ,
            ( Marker "union_defn"
            , Quantified Universally
                ( Scope
                    ( Connected Equivalence
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            ]
                        )
                        ( Connected Disjunction
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                ]
                            )
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            )
                        )
                    )
                )
            )
        ,
            ( Marker "ext"
            , Quantified Universally
                ( Scope
                    ( Connected Implication
                        ( Quantified Universally
                            ( Scope
                                ( Connected Equivalence
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "A" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "B" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                )
                            )
                        )
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Symbol "=" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            ]
                        )
                    )
                )
            )
        ]
    , taskConjectureLabel = Marker "union_assoc"
    , taskConjecture = Quantified Universally
        ( Scope
            ( Connected Implication
                ( TermSymbol
                    ( SymbolPredicate
                        ( PredicateRelation
                            ( Command "in" )
                        )
                    )
                    [ TermVar
                        ( B
                            ( NamedVar "a" )
                        )
                    , TermSymbol
                        ( SymbolMixfix
                            [ Nothing
                            , Just
                                ( Command "union" )
                            , Nothing
                            ]
                        )
                        [ TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "A" )
                                    )
                                )
                            , TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "B" )
                                    )
                                )
                            ]
                        , TermVar
                            ( F
                                ( TermVar
                                    ( NamedVar "C" )
                                )
                            )
                        ]
                    ]
                )
                ( TermSymbol
                    ( SymbolPredicate
                        ( PredicateRelation
                            ( Command "in" )
                        )
                    )
                    [ TermVar
                        ( B
                            ( NamedVar "a" )
                        )
                    , TermSymbol
                        ( SymbolMixfix
                            [ Nothing
                            , Just
                                ( Command "union" )
                            , Nothing
                            ]
                        )
                        [ TermVar
                            ( F
                                ( TermVar
                                    ( NamedVar "A" )
                                )
                            )
                        , TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "B" )
                                    )
                                )
                            , TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "C" )
                                    )
                                )
                            ]
                        ]
                    ]
                )
            )
        )
    }
, Task
    { taskDirectness = Direct
    , taskHypotheses =
        [
            ( Marker "union_comm"
            , Quantified Universally
                ( Scope
                    ( TermSymbol
                        ( SymbolPredicate
                            ( PredicateRelation
                                ( Symbol "=" )
                            )
                        )
                        [ TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            ]
                        , TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            ]
                        ]
                    )
                )
            )
        ,
            ( Marker "union_defn"
            , Quantified Universally
                ( Scope
                    ( Connected Equivalence
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            ]
                        )
                        ( Connected Disjunction
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                ]
                            )
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            )
                        )
                    )
                )
            )
        ,
            ( Marker "ext"
            , Quantified Universally
                ( Scope
                    ( Connected Implication
                        ( Quantified Universally
                            ( Scope
                                ( Connected Equivalence
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "A" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "B" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                )
                            )
                        )
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Symbol "=" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            ]
                        )
                    )
                )
            )
        ,
            ( Marker "union_assoc1"
            , Quantified Universally
                ( Scope
                    ( Connected Implication
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermSymbol
                                    ( SymbolMixfix
                                        [ Nothing
                                        , Just
                                            ( Command "union" )
                                        , Nothing
                                        ]
                                    )
                                    [ TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "A" )
                                            )
                                        )
                                    , TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "B" )
                                            )
                                        )
                                    ]
                                , TermVar
                                    ( F
                                        ( TermVar
                                            ( NamedVar "C" )
                                        )
                                    )
                                ]
                            ]
                        )
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermVar
                                    ( F
                                        ( TermVar
                                            ( NamedVar "A" )
                                        )
                                    )
                                , TermSymbol
                                    ( SymbolMixfix
                                        [ Nothing
                                        , Just
                                            ( Command "union" )
                                        , Nothing
                                        ]
                                    )
                                    [ TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "B" )
                                            )
                                        )
                                    , TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "C" )
                                            )
                                        )
                                    ]
                                ]
                            ]
                        )
                    )
                )
            )
        ]
    , taskConjectureLabel = Marker "union_assoc"
    , taskConjecture = Quantified Universally
        ( Scope
            ( Connected Implication
                ( TermSymbol
                    ( SymbolPredicate
                        ( PredicateRelation
                            ( Command "in" )
                        )
                    )
                    [ TermVar
                        ( B
                            ( NamedVar "a" )
                        )
                    , TermSymbol
                        ( SymbolMixfix
                            [ Nothing
                            , Just
                                ( Command "union" )
                            , Nothing
                            ]
                        )
                        [ TermVar
                            ( F
                                ( TermVar
                                    ( NamedVar "A" )
                                )
                            )
                        , TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "B" )
                                    )
                                )
                            , TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "C" )
                                    )
                                )
                            ]
                        ]
                    ]
                )
                ( TermSymbol
                    ( SymbolPredicate
                        ( PredicateRelation
                            ( Command "in" )
                        )
                    )
                    [ TermVar
                        ( B
                            ( NamedVar "a" )
                        )
                    , TermSymbol
                        ( SymbolMixfix
                            [ Nothing
                            , Just
                                ( Command "union" )
                            , Nothing
                            ]
                        )
                        [ TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "A" )
                                    )
                                )
                            , TermVar
                                ( F
                                    ( TermVar
                                        ( NamedVar "B" )
                                    )
                                )
                            ]
                        , TermVar
                            ( F
                                ( TermVar
                                    ( NamedVar "C" )
                                )
                            )
                        ]
                    ]
                )
            )
        )
    }
, Task
    { taskDirectness = Direct
    , taskHypotheses =
        [
            ( Marker "union_comm"
            , Quantified Universally
                ( Scope
                    ( TermSymbol
                        ( SymbolPredicate
                            ( PredicateRelation
                                ( Symbol "=" )
                            )
                        )
                        [ TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            ]
                        , TermSymbol
                            ( SymbolMixfix
                                [ Nothing
                                , Just
                                    ( Command "union" )
                                , Nothing
                                ]
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            ]
                        ]
                    )
                )
            )
        ,
            ( Marker "union_defn"
            , Quantified Universally
                ( Scope
                    ( Connected Equivalence
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            ]
                        )
                        ( Connected Disjunction
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "A" )
                                    )
                                ]
                            )
                            ( TermSymbol
                                ( SymbolPredicate
                                    ( PredicateRelation
                                        ( Command "in" )
                                    )
                                )
                                [ TermVar
                                    ( B
                                        ( NamedVar "a" )
                                    )
                                , TermVar
                                    ( B
                                        ( NamedVar "B" )
                                    )
                                ]
                            )
                        )
                    )
                )
            )
        ,
            ( Marker "ext"
            , Quantified Universally
                ( Scope
                    ( Connected Implication
                        ( Quantified Universally
                            ( Scope
                                ( Connected Equivalence
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "A" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                    ( TermSymbol
                                        ( SymbolPredicate
                                            ( PredicateRelation
                                                ( Command "in" )
                                            )
                                        )
                                        [ TermVar
                                            ( B
                                                ( NamedVar "a" )
                                            )
                                        , TermVar
                                            ( F
                                                ( TermVar
                                                    ( B
                                                        ( NamedVar "B" )
                                                    )
                                                )
                                            )
                                        ]
                                    )
                                )
                            )
                        )
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Symbol "=" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "A" )
                                )
                            , TermVar
                                ( B
                                    ( NamedVar "B" )
                                )
                            ]
                        )
                    )
                )
            )
        ,
            ( Marker "union_assoc1"
            , Quantified Universally
                ( Scope
                    ( Connected Implication
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermVar
                                    ( F
                                        ( TermVar
                                            ( NamedVar "A" )
                                        )
                                    )
                                , TermSymbol
                                    ( SymbolMixfix
                                        [ Nothing
                                        , Just
                                            ( Command "union" )
                                        , Nothing
                                        ]
                                    )
                                    [ TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "B" )
                                            )
                                        )
                                    , TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "C" )
                                            )
                                        )
                                    ]
                                ]
                            ]
                        )
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermSymbol
                                    ( SymbolMixfix
                                        [ Nothing
                                        , Just
                                            ( Command "union" )
                                        , Nothing
                                        ]
                                    )
                                    [ TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "A" )
                                            )
                                        )
                                    , TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "B" )
                                            )
                                        )
                                    ]
                                , TermVar
                                    ( F
                                        ( TermVar
                                            ( NamedVar "C" )
                                        )
                                    )
                                ]
                            ]
                        )
                    )
                )
            )
        ,
            ( Marker "union_assoc2"
            , Quantified Universally
                ( Scope
                    ( Connected Implication
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermSymbol
                                    ( SymbolMixfix
                                        [ Nothing
                                        , Just
                                            ( Command "union" )
                                        , Nothing
                                        ]
                                    )
                                    [ TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "A" )
                                            )
                                        )
                                    , TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "B" )
                                            )
                                        )
                                    ]
                                , TermVar
                                    ( F
                                        ( TermVar
                                            ( NamedVar "C" )
                                        )
                                    )
                                ]
                            ]
                        )
                        ( TermSymbol
                            ( SymbolPredicate
                                ( PredicateRelation
                                    ( Command "in" )
                                )
                            )
                            [ TermVar
                                ( B
                                    ( NamedVar "a" )
                                )
                            , TermSymbol
                                ( SymbolMixfix
                                    [ Nothing
                                    , Just
                                        ( Command "union" )
                                    , Nothing
                                    ]
                                )
                                [ TermVar
                                    ( F
                                        ( TermVar
                                            ( NamedVar "A" )
                                        )
                                    )
                                , TermSymbol
                                    ( SymbolMixfix
                                        [ Nothing
                                        , Just
                                            ( Command "union" )
                                        , Nothing
                                        ]
                                    )
                                    [ TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "B" )
                                            )
                                        )
                                    , TermVar
                                        ( F
                                            ( TermVar
                                                ( NamedVar "C" )
                                            )
                                        )
                                    ]
                                ]
                            ]
                        )
                    )
                )
            )
        ]
    , taskConjectureLabel = Marker "union_assoc"
    , taskConjecture = TermSymbol
        ( SymbolPredicate
            ( PredicateRelation
                ( Symbol "=" )
            )
        )
        [ TermSymbol
            ( SymbolMixfix
                [ Nothing
                , Just
                    ( Command "union" )
                , Nothing
                ]
            )
            [ TermSymbol
                ( SymbolMixfix
                    [ Nothing
                    , Just
                        ( Command "union" )
                    , Nothing
                    ]
                )
                [ TermVar
                    ( NamedVar "A" )
                , TermVar
                    ( NamedVar "B" )
                ]
            , TermVar
                ( NamedVar "C" )
            ]
        , TermSymbol
            ( SymbolMixfix
                [ Nothing
                , Just
                    ( Command "union" )
                , Nothing
                ]
            )
            [ TermVar
                ( NamedVar "A" )
            , TermSymbol
                ( SymbolMixfix
                    [ Nothing
                    , Just
                        ( Command "union" )
                    , Nothing
                    ]
                )
                [ TermVar
                    ( NamedVar "B" )
                , TermVar
                    ( NamedVar "C" )
                ]
            ]
        ]
    }
]