/* edcg2.pl  (E-DCG 2) */

   s(s(NP,VP)) --> np(NP), vp(VP). 
   np(np(PN)) --> pn(PN).	
   np(np(DET,N)) --> det(DET), n(N). 	
   vp(vp(V,NP)) --> v(V), np(NP).
   vp(vp(V)) --> v(V). 	
   det(det(a)) --> [a]. 			
   n(n(boy)) --> [boy].
   n(n(book)) --> [book]. 				
   pn(pn(mimi)) --> [mimi]. 				
   pn(pn(wusang)) --> [wusang]. 				
   v(v(sleeps)) --> [sleeps]. 				
   v(v(like)) --> [likes].