static Set<S> mechList_isEnglishVerb_cache;

static mechList_isEnglishVerb(S s) {
  Set<S> set = mechList_isEnglishVerb_cache;
  if (set == null)
    mechList_isEnglishVerb_cache = set = asCISet(mechList("Verbs"));
  ret contains(set, s);
}