static S ai_text(S a, S b, S c) {
  ret web_text(first(ai_search_dollarX(a, b, c)));
}

static S ai_text(T3<S> t) {
  ret ai_text(t.a, t.b, t.c);
}

ifclass AI_SubSpace
static S ai_text(AI_SubSpace ss, S a, S b, S c) {
  S query = isDollarVar(a) ? c : a;
  ret webs_tripleSearch_dollarX(a, b, c, indexedWebs(ss, query));
}
endif