Task: Story Composition
Input (English): Premise: Mike was the star of the high school basketball team. 
 Initial Context: Then one night, he was in a terrible car accident. 
 Original Ending: The accident left him paralyzed from the waist down. Undeterred, Mike went into physical therapy. A year later, Mike continued playing basketball in a wheelchair. 
 Counterfactual Context: Then one night, he was killed in a terrible car accident.
Output (English): His friend and co-player John was paralyzed from the waist down. Undeterred, John went into physical therapy. A year later, John continued playing basketball in a wheelchair.