code: public String[][] toWordTagNerArray(NERTagSet tagSet)
      {
          List<String[]> tupleList = Utility.convertSentenceToNER(this, tagSet);
          String[][] result = new String[3][tupleList.size()];
          Iterator<String[]> iterator = tupleList.iterator();
          for (int i = 0; i < result[0].length; i++)
          {
              String[] tuple = iterator.next();
              for (int j = 0; j < 3; ++j)
              {
                  result[j][i] = tuple[j];
              }
          }
          return result;
      }
docs: word pos ner
  
  @param tagSet
  @return