Task: Story Composition
Input (English): Premise: I got injured during basketball practice. 
 Initial Context: I was running down the court with the ball. 
 Original Ending: Another player ran into me at top speed. She had a dent in her forehead from the impact. My jaw was pushed into my ear canal. 
 Counterfactual Context: I was running down the court with the ball when I tripped into the wall.
Output (English): Another player ran by me at top speed. I had a dent in my forehead from the impact. My jaw was pushed into my ear canal.