Task: Dialogue Generation
Input (English): F: Ladies and gentlemen, we'll pay a visit to a cave tomorrow. ,M: What fun is it to visit the cave you mean? ,F: It's an uncommon cave. It's underground, wide and long and in the cave there's rocks of different shapes which looked like a lion, a tree, a bell or something else.
(A) M: I’m sorry, I don’t understand. Could you say it again? (B) M: I understand. This cave is narrow and short, but it is the strange rocks and stream inside make the cave uncommon. (C) M: Wow, an underground, wide and long cave is really special. It would be better if there are strange rocks and stream. (D) M: This uncommon cave is underground, wide and long with strange rocks and stream. It is a great plan to visit it next month.
Output (English): A