Finally, there is a considerable work in Natural Language Processing oriented kernel (Collins and Duffy, 2002;Lodhi et al., 2000;Gärtner, 2003;Cumby and Roth, 2003;Zelenko et al., 2003) about string, parse-tree, graph, and relational kernels but, to our knowledge, none of them was used to derive semantic information on the form of predicate argument structures.
(Cristianini et al., 2001;Kandola et al., 2003) address the problem of semantic similarity between two terms by using, respectively, document sets as term context and the latent semantic indexing.