Task: Question Answering
Input (English): Passage: My friend and I decided we would like to play a game of tennis . We called up the tennis club to find an open court . They said they had one open at 8 pm . We arrived and found our court . we flipped a coin to decide who would serve first . I ended up serving first . Then my friend missed returning the ball and I got a point . The next time he served and I ran to hit the tennis ball but I just missed and he got the point . The next time I served I hit all of mine out of bounds , so they did not count . This time we hit the ball back and forth a few times before he scored again.There were exchanges like this for about an hour . My friend won the match but I still had a lot of fun . Question: What did they hit back and forth? Option1: soccer ball Option2: The tennis ball.
Output (English): The tennis ball.