Task: Story Composition
Input (English): Premise: Adam was excited to set up an aquarium. 
 Initial Context: He enjoyed choosing fish to fill the new tank. 
 Original Ending: Adam chose many fish, including one that was large and showy. He dumped the fish in the tank and watched them swim around. Soon, the small fish covered the large one and began biting it. 
 Counterfactual Context: There was only one fish he wanted in his tank.
Output (English): Adam chose  one that was large and showy. He dumped the fish in the tank and watched it swim around. The large fish was all alone in its tank.