sS ai_addNounRefsForSimplestNounPhrases(S s) {
  S s2, LS nouns = unpair ai_groupAndReturnSimplestNounPhrases(s);
  ret ai_createNounRefs_1(javaTokWithBracketsAndRanges(s2),
    ai_pronouns(),
    combinedSet(ai_nouns(), mapToCISet optCurly(nouns)));
}