static ai_spec_answerOnChat(S s) {
  if (ai_hasTriple(s, "should be", "answered in the chat")) {
    L<S> answers = ai_texts("$X", "answers", s);
    if (nempty(answers)) {
      ai_invalidateTriple(s, "should be", "answered in the chat");
      postToStefansChat(s + "\n=> " + joinWithComma(answers));
      ai_postTriple(s, "was", "answered in the chat");
    }
  }
}