static S ai_makePartQuestion(S chatName, S id) {
  if (empty(id)) null;
  for (S aThing : ai_texts_verified(id, "is", "$X")) {
    L<S> parts = ai_partsOf(aThing);
    for (S part : unnull(parts)) {
      S thePart = ai_spec_allWords(part + " of " + id);
      if (ai_text(thePart, "is", "$X") != null) continue;
      S q = "What is its " + drop_a_an_the(part) + "?";
      post("Open question in " + chatName, "is", thePart);
      ret q;
    }
  }
  null;
}