Most systems extract co-occurrence and syntactic information from the words surrounding the target term, which is then converted into a vector-space representation of the contexts that each target term appears in (Brown et al., 1992;Pereira et al., 1993;Ruge, 1997;Lin, 1998b).
it is also important to consider how information extracted by systems such as thesaurus extraction systems can be incorporated into tasks which use predominantly supervised techniques, e.g.