/*
  if input (how many triples do we have?)
  and ($n = ai_allWebsCount())
  then say (We have $n triples.)
*/
static S rule_numberOfTriples() {
  ai_checkInput_match3("how many triples do we have?");
  long n = ai_allWebsCount();
  ret replaceVars2("We have $n triples.", "$n", formatWithThousands(n));
}