Task: Dialogue Generation
Input (English): F: Excuse me， could you show me the way to the nearest subway station. ,M: Of course, go straight down this road, take the second turning on your right, then you will see a big supermarket on the left. The station is just next to it. ,F: Is it far from here? ,M: No, not really. It's just 10 minutes walk.
(A) F:  Okay, so it takes 10 minutes to go to the nearest subway station on foot. (B) F: I am afraid I did not quite catch what you were saying. Please repeat it. (C) F:  Okay, so it takes 10 minutes to go to the nearest subway station by taxi. (D) F:  Okay, so it takes 20 minutes to go to the nearest subway station by taxi.
Output (English): A