code: public final void evaluate() throws IOException {
      final SequenceLabelerEvaluator evaluator = new SequenceLabelerEvaluator(this.corpusFormat,
          this.sequenceLabeler);
      evaluator.evaluate(this.testSamples);
      System.out.println(evaluator.getFMeasure());
    }
docs: Evaluate and print precision, recall and F measure.
  
  @throws IOException
  if test corpus not loaded