Task: Question Answering
Input (English): Passage: First we travel to the tennis court . Next we change into our sports clothes , and put on our tennis shoes . Then we grab our equipment and some balls from the supply .  We begin to play the match .  This racket allows you to swing and hit a ball over a net . The goal is to avoid hitting the net , and hit the ball so that it is difficult for your opponent to hit the ball back to you . However , if your opponent hits the ball , he must also make sure the ball does n't touch the net .  Both of you may hit the ball off the ground , reflecting it into the air yet you must avoid the net .  If your opponent hits the next or makes the ball go out of bounds , then you score a point . Question: How often does the player try to get his opponent to hit the net? Option1: once Option2: every time it is served or returned to the player
Output (English): every time it is served or returned to the player