Task: Question Answering
Input (English): Passage: One day , I wanted to play tennis with a friend . I asked my friend if he had a tennis racket . His name is Bob . We called the tennis court at the park to see if a court could be reserved . We reserved a court for an hour . We went to a sports store to buy tennis balls . We went to the tennis court . We used the dressing room to get into shorts . We decide to play 4 games . I started the first game serving . I won 3 games and Bob won one game . We left the tennis court after the 4th game . We paid the tennis office manager for the rental of the court . We both felt tired but healthier after playing . We decided to play tennis on one Saturday each month . Question: When did they take turns serving? Option1: When playing soccer Option2: When playing tennis
Output (English): When playing tennis