static Collection<GInterpretable> gazelle_processWithPurpose(S input1, S purpose, O... _) {

  Set<S> texts = litCISet();

  new L<GInterpretable> interpretables;

  int max = optPar max(_, 20);

  Collector<GInterpretable> collector = limitedCollector(interpretables, max);

  RuleEngine2 engine = ((F0<GazelleEvalContext>) optPar contextMaker(_)).get().engine;

  int nInterpreted = -1;

  bigLoop: while (!collector.full() && nInterpreted < l(interpretables)) {

    GInterpretable workingOn = get(interpretables, nInterpreted);

    S input = nInterpreted < 0 ? input1 : workingOn.text;

    S ruleBase = workingOn == null ? "" : workingOn.ruleID + "+";

    ++nInterpreted;

    for (RuleEngine2.SimplifyWithRule rule : engine.splitterRules()) pcall {

      for (S out : gazelle_executeSplitterRule(engine, rule, input))

        if (texts.add(out))

          if (collector.add(new GInterpretable(out, ruleBase + rule.globalID))) break bigLoop;

    }

    for (GazelleTree t : dm_gazelle_reasonAboutChatInput_v2(null, input, 

      paramsPlus(_, skipSplitters := true, acceptablePurposes := litset(purpose), skipUserName := true, skipUserID := true)))

        if (texts.add(t.line))

          if (collector.add(new GInterpretable(t.line, ruleBase + t.ruleID()))) break bigLoop;

  }

  ret interpretables;

}