Task: Dialogue Generation
Input (English): M: This is a picture of my family. It was taken last year in front of my house. ,F: Yes, I can see your grandma, your dad, your mom and your dog. And this is you. How lovely!
(A) M: But my mom was out for work, so she's not in the photo. (B) M: Why isn't your grandpa in the photo? (C) M: This is my family photo, but my grandma is not here. (D) M: I am sorry. You spoke so rapidly that I did not catch the meaning of what you said. Could you repeat that?
Output (English): B