In the first, we explore the use of features extracted from syntactic and semantic processing at a level that is robust to changes in genre and language.
we seek to go beyond the kind of bag of local words features employed in earlier systems (Bagga & Baldwin, 1998;Gooi & Allan, 2004;Pedersen et al., 2005) that did not attempt to exploit deep semantic features that are difficult to extract, and to go beyond the kind of biographical information (Mann & Yarowsky, 2003) that is unlikely to occur with great frequency (such as place of birth, or family relationships) in many of the documents returned by typical search engines.