code: public List<List<IWord>> getComplexSentenceList()
      {
          List<List<IWord>> complexList = new LinkedList<List<IWord>>();
          for (Sentence sentence : sentenceList)
          {
              complexList.add(sentence.wordList);
          }
  
          return complexList;
      }
docs: 获取复杂句子列表，句子中的每个单词有可能是复合词，有可能是简单词
  
  @return