[ BlockLemma
    ( SourcePos
        { sourceName = "test/examples/relation-notation.tex"
        , sourceLine = Pos 1
        , sourceColumn = Pos 1
        }
    )
    ( Marker "mathrel_notation_test" )
    ( Lemma []
        ( StmtConnected Implication
            ( StmtFormula
                ( FormulaChain
                    ( ChainBase
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        ) Positive
                        ( RelationExpr
                            ( ExprVar
                                ( NamedVar "R" )
                            )
                        )
                        ( ExprVar
                            ( NamedVar "y" ) :| []
                        )
                    )
                )
            )
            ( StmtFormula
                ( FormulaChain
                    ( ChainBase
                        ( ExprVar
                            ( NamedVar "x" ) :| []
                        ) Positive
                        ( RelationExpr
                            ( ExprVar
                                ( NamedVar "R" )
                            )
                        )
                        ( ExprVar
                            ( NamedVar "y" ) :| []
                        )
                    )
                )
            )
        )
    )
]