static LS ai_adverbsFromTriple(T3<S> t) {
  new LS l;
  S b = t.b;
  S s = firstJavaToken(b);
  while (isAdverb(s)) {
    l.add(s);
    b = trim(dropFirstJavaToken(b));
    s = firstJavaToken(b);
  }
  ret l;
}