Task: Story Composition
Input (English): Premise: Zac thought he was the best at every athletic activity. 
 Initial Context: He and his new girlfriend went skiing together. 
 Original Ending: He challenged her to a race down the mountain. He was shocked and angry when she beat him. He didn't know she had been a ski racer when she was a teenager. 
 New ending: He challenged her to a game. He was shocked and angry when she beat him. He didn't know she had been a basketball player when she was a teenager. 
Output (English): He and his new girlfriend went to play basketball.