task.setPrepositionalPhrase(pp);
task.setPrepositionalPhrases(pp);
  public static NewTask addPrepositionalPhrase(NewTask task, PrepositionalPhrase pp)  {    Enumeration enum = task.getPrepositionalPhrases();    if (!enum.hasMoreElements())      task.setPrepositionalPhrase(pp);    else {      Vector phrases = new Vector();      while (enum.hasMoreElements()) {	phrases.addElement(enum.nextElement());      }