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(
        curly(trimJoinSubList(tok, 0, i-1))
        + trimJoinSubList(tok, i-1, i+1)
        + curly(trimJoinSubList(tok, i+1)))
        + " is a possible grouping of " + quote(fact));
    }
  }
}