Task: Dialogue Generation
Input (English): F: I came across David in the hospital this morning. He broke his left leg when he was learning to ride a horse earlier this morning. ,M: What happened exactly? ,F: The horse is frightened by a dog and started running fast. David lost his balance and fell to the ground.
(A) M: I didn’t hear you. Please could you tell me again? (B) M: So David fell off a horse because the horse was frightened by a cat? That's horrible! (C) M: I am so sorry that David was bitten by a dog. (D) M: David fell off a horse? That's too bad!
Output (English): D