docs: public static <I, O> SequenceTaggerError evaluateTagger(SequenceTagger<I, O> tagger,
        Collection<? extends TaggedSequence<I, O>> evaluationData) {
      MapReduceExecutor executor = MapReduceConfiguration.getMapReduceExecutor();
      return executor.mapReduce(evaluationData, new SequenceTaggerEvaluationMapper<I, O>(tagger, -1),
          new SequenceTaggerEvaluationReducer());
    }