code: public final List<String> posAnnotate(final String[] tokens) {
      final String[] annotatedText = this.posTagger.tag(tokens);
      final List<String> posTags = new ArrayList<String>(
          Arrays.asList(annotatedText));
      return posTags;
    }
docs: Produce postags from a tokenized sentence.
  
  @param tokens
  the sentence
  @return a list containing the postags