Some researchers have discovered that supplementing basic syntactic features with information about adjuncts, co-occurrences, tense, and/or voice of the verb have resulted in better performance.
additional information about semantic SPs of verbs has not yielded considerable improvement on verb classification although SPs can be strong indicators of diathesis alternations (Mc-Carthy, 2001) and although fairly precise semantic descriptions, including information about verb se-1 See section 6 for discussion on previous work.