static S ai_ihnSie(S s) {
  L<S> tok = javaTok(s);
  
  for (int i : jfindAll(tok, "ihn/sie"))
    for (int j = i-2; j > 0; j -= 2) {
      S sex = mechMapCI("Name => Geschlecht").get(tok.get(j));
      if (nempty(sex)) {
        replaceTokens(tok, i, i+5, eqic(sex, "männlich") ? "ihn" : "sie");
        continue;
      }
    }
    
  ret join(tok);
}