_hypernym(X,Y) <= _also_see(Y,X)
_derivationally_related_form(X,Y) <= _derivationally_related_form(Y,X)
_verb_group(X,Y) <= _verb_group(Y,X)
_derivationally_related_form(X,Y) <= _synset_domain_topic_of(Y,X)
_derivationally_related_form(X,Y) <= _synset_domain_topic_of(X,Y)
_verb_group(X,Y) <= _hypernym(X,Y)
_verb_group(X,Y) <= _hypernym(Y,X)
_also_see(X,Y) <= _hypernym(Y,X)
_hypernym(X,Y) <= _verb_group(X,Y)
_also_see(X,Y) <= _also_see(Y,X)
_similar_to(X,Y) <= _similar_to(Y,X)
