verbSet.add (Verb.getVerb(tokenizer.nextToken().trim()));
verbSet.add (Verb.get(tokenizer.nextToken().trim()));
  protected Collection parseVerbs (String verbs) {    StringTokenizer tokenizer = new StringTokenizer(verbs, ",");    Set verbSet = new HashSet ();    while (tokenizer.hasMoreTokens())      verbSet.add (Verb.getVerb(tokenizer.nextToken().trim()));    return verbSet;  }