Task: Dialogue Generation
Input (English): F: Sam, who is this in this picture? ,M: Emm, oh, that's my brother, Chris. He went sailing that one time, but he didn't like it. He is a good climber though. He spends every weekend doing that.
(A) F: I am afraid I did not quite catch what you were saying. Please repeat it. (B) F: Your brother Chris likes both sailing and climbing? Good for him! (C) F: I didn't know that your brother Chris is a good climber. (D) F: Oh, your brother Steve is such a good climber!
Output (English): C