concrete AdverbTha of Adverb = CatTha ** 
  open ResTha, StringsTha, Prelude in {

  lin
    PositAdvAdj a = a ;

--    ComparAdvAdj cadv a np = {
--      s = cadv.s ++ a.s ! AAdv ++ "than" ++ np.s ! Nom
--      } ;
--    ComparAdvAdjS cadv a s = {
--      s = cadv.s ++ a.s ! AAdv ++ "than" ++ s.s
--      } ;
--
--    PrepNP prep np = {s = prep.s ++ np.s ! Acc} ;
--
--    AdAdv = cc2 ;
--
--    SubjS = cc2 ;
--    AdvSC s = s ; --- this rule give stack overflow in ordinary parsing
--
--    AdnCAdv cadv = {s = cadv.s ++ "than"} ;
--
}