static int ai_forgetHttpRequestsForPath(S path) {
  new L<TripleWeb> toInvalidate;
  for (S s : ai_texts("$X", "was for path", path))
    if (isCIPrefixPlusGlobalID(s, "HTTP request "))
      toInvalidate.addAll(triplesWithA(s));
  ai_removeTriplesInMemory(toInvalidate);
  ret l(toInvalidate);
}