To alleviate the issue of low coverage, a large body of work has been dedicated to lexicon learning from more abundant and less restricted comparable data, e.g., (Fung and Yee, 1998;Rapp, 1999;Gaussier et al., 2004;Shezaf and Rappoport, 2010;Tamura et al., 2012).
the results appear to indicate that adding such additional information does not have a clear effect for genuine similarity, but may lead to a small performance increase for relatedness.