svoid ai_emitPossibleIsGroupings(LS facts) {
  for (S fact : unnull(facts)) {
    L<S> tok = javaTokPlus3Brackets(fact);
    L<Int> l = indicesOfIC(tok, "is");
    if (l(l) == 1) {
      int i = first(l);
      emitFact(quote(trimJoinSubList(tok, 0, i)) + "is  a possible grouping of " + quote(trimJoinSubList(tok, i+1)));
    }
  }
}