started a subdir for the book

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diff --git a/book/examples/chapter9/SemanticsIta.gf b/book/examples/chapter9/SemanticsIta.gf
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+concrete SemanticsIta of Semantics = GrammarIta, LogicSymb ** open ResIta, Formal, Prelude in {
+
+lin
+  iN f = star (f.s ! Sg) ;
+  iA f = star (f.s ! Masc ! Sg) ;
+  iV f = star (f.s ! VInf) ;
+  iV2 f x y = star (f.s ! VInf) (cc2 x y) ;
+
+oper star : Str -> SS -> TermPrec = \f,x -> prefix 3 (f ++ "*") (constant (parenth x.s)) ;
+
+{-
+
+lincat
+  T, I = TermPrec ;
+lin
+  And = infixl 2 "&" ;
+  Or  = infixl 2 "v" ;
+  If  = infixr 1 "->" ;
+--  Not = prefix 3 "~" ;
+--  All : (I -> T) -> T ;
+--  Exist : (I -> T) -> T ;
+--  Past : T -> T ;
+
+lin
+  iS   : S -> T ;
+  iCl  : Cl -> T ;
+  iNP  : NP -> (I -> T) -> T ;
+  iVP  : VP -> I -> T ;
+  iAP  : AP -> I -> T ;
+  iCN  : CN -> I -> T ;
+  iDet : Det -> (I -> T) -> (I -> T) -> T ;
+  iN   : N -> I -> T ;
+  iA   : A -> I -> T ;
+  iV   : V -> I -> T ;
+  iV2  : V2 -> I -> I -> T ;
+  iAdA : AdA -> (I -> T) -> I -> T ;
+  iTense : Tense -> T -> T ;
+  iPol  : Pol  -> T -> T ;
+  iConj : Conj -> T -> T -> T ;
+-}
+
+}