Task: Story Composition
Input (English): Premise: Mike took his dog for a walk. 
 Initial Context: He went down to the end of the block. 
 Original Ending: His friend Tommy was there with his dog. Tommy and Mike talked while their dogs played. The boys said goodbye and went back home. 
 Counterfactual Context: He went back inside his house.
Output (English): His friend Tommy was outside with his dog. Tommy and Mike talked through the window while their dogs played. The boys said goodbye and Tommy went back home.