The advantage of the proposed method compared to previous methods that use nothing but either distributional similarity of a trg or co-occurrence with their hypernyms via lexico-syntactic patterns (Snow et al., 2006;Yamada et al., 2009) (or both) was demonstrated as follows.
it was shown that many terms do not have reliable distributional similarity (owing to their infrequency in a corpus) and do not co-occur with their hypernyms via any lexico-syntactic pattern in a sentence.