Task: Story Composition
Input (English): Premise: I bought my dog a tennis ball. 
 Initial Context: I threw it across the yard, and she chased it. 
 Original Ending: She caught it just as it reached the neighbor's yard. She came running back with it in her mouth. She refused to give it back to me. 
 Counterfactual Context: I threw it across the year, and she just watched it.
Output (English): She watched it reach the neighbor's yard. I had to go and get it. I refused to throw it again.