Task: Story Composition
Input (English): Premise: Bill loved playing tennis. 
 Initial Context: For Bill's 14th birthday, his parents took him to tennis camp. 
 Original Ending: Bill impressed the counselors at tennis camp with his enthusiasm. Because of Bill's abilities, he was offered a ball boy position. Bill became a ball boy at a tennis tournament and loved it. 
 New ending: Bill impressed the teacher at tennis lessons with his enthusiasm. Because of Bill's abilities, he was offered a ball boy position. Bill became a ball boy at a tennis tournament and loved it. 
Output (English): For Bill's 14th birthday, his parents bought him tennis lessons.