REQUEST system的用法和樣例：
例句
- A knowledge base with self-contained functions and knowledge can consumedly improve efficiency and accuracy of a question answering system.
一個功能和知識完備的知識庫能夠大大提高問答系統的效率與準確率。 - We conclude with some yet unsolvable but quite interesting problems to study in the future to build a complete opinion QA system.
最後我們總結目前的實驗結果，並提出一些相當有趣的議題，以供未來研究，進而實現一個完整的意見問答系統。
