Task: Story Composition
Input (English): Premise: Peter adopted a dog from the pound one day. 
 Initial Context: He brought the dog home and fed it. 
 Original Ending: He played with the dog and showed it a dog bed. He gave it a bone for a treat. The dog fell asleep, and Peter went to bed. 
 Counterfactual Context: He took the dog to the vet first to make sure it was healthy and left him there overnight.
Output (English): He picked the dog up, and played with it all day. He gave it a bone for a treat. The dog fell asleep, and Peter went to bed.