Task: Dialogue Generation
Input (English): F: I can't believe you can play the guitar so well. ,M: I have learned to play the guitar for 10 years and I want to learn to play the piano now.
(A) F: I’m sorry, I don’t understand. Could you say it again? (B) F: Now I am not surprised that you are good at playing the guitar. (C) F: Really? You have just learned to play the guitar for 2 months? But you are good at playing the guitar! (D) F: Okay. You mean you don't want to learn to play the piano now because you are good at playing the piano.
Output (English): B