// e.g."if a snippet contains token X, it also contains token Y";
static NLABlock ai_pronounResolvedToNLA(S s) {
  s = ai_dropFillers1(s);
  print(s);
  AI_PronounResolver1 resolver = new(s);
  resolver.run();
  print(resolver.nounPhrases);
  print(resolver.pronouns);
  
  for (Map mapping : resolver.allMappings()) {
    L<ParsedWithTokens> pwt = replaceElementsUsingMap(resolver.pwt, mapping);
    pnl(pwt);
  
    new NLABlock nla;
    new Map<ParsedWithTokens, NLABlock.Entity> entityMapping;
    for (ParsedWithToken p : values(mapping)) {
      S name = (S) t!;
      NLABlock.Line line = nla.new Line("there is " + name);
      nla.lines.add(line);
      NLABlock.Entity e = nla.new Entity(name, line);
      nla.entities.add(e);
      entityMapping.put(p, e);
    }
    replaceElementsUsingMap(pwt, entityMapping);
    nla.lines.add();
  }
}