Task: Story Composition
Input (English): Premise: I got a basketball on my birthday. 
 Initial Context: I played with it every single day. 
 Original Ending: One day, the ball went over my neighbor's fence. I thought he'd be mad! Instead, he came over and played with me! 
 Counterfactual Context: I never played with it.
Output (English): Until one day my friend threw it over my neighbor's fence. I thought he'd be mad! Instead, he came over and played with us!