!7

p-exp {
  S input = "hey, bot, what time is it yo bot please?";

  final Set<S> set = mechSetCI("Appellations");
  
  pnl(repeatedInputModificationsIterator(input, func(S s) -> L<ItIt<S>> {
    ai_dropLeadingAndTrailingPhrasesIterators(s, set)
  }));
}