static int ai_forgetAllHttpRequests() {
  int n = 0;
  new L<TripleWeb> toInvalidate;
  for ping (TripleWeb w : cloneList(ai_triplesWithB("was for path"))) {
    if (isCIPrefixPlusGlobalID_oneOf(w.a, "HTTP request ", "Bot HTTP request ")) {
      toInvalidate.addAll(triplesWithA(w.a));
      if (l(toInvalidate) >= 500000)
        n += ai_removeTriplesInMemoryAndClear(toInvalidate);
    }
  }
  ret n + ai_removeTriplesInMemory(toInvalidate);
}