13 This is a very important property of lexical acquisition algorithms to be used for lexicon organization, as their main interest lies in being applied to unknown words.
our approach is similar to the approaches of Siegel, and Lapata and Brew (1999), in attempting to learn semantic notions from distributions of 12 A baseline of 5% is reported, based on a closest-neighbor pairing of verbs, but it is not straightforward to compare this task to the proposed clustering algorithm.