Task: Story Composition
Input (English): Premise: Tim found a fish tank on the side of the road. 
 Initial Context: He picked it up and brought it home. 
 Original Ending: The next day he went to the pet store to get fish. He bought some fish and food. Tim filled the tank with water and put in his new fish. 
 Counterfactual Context: It had a giant crack in it, so he left it where it was.
Output (English): The next day he went to the pet store to get fish and a tank without cracks. He bought some fish and food. Tim filled the tank with water and put in his new fish.