Task: Story Composition
Input (English): Premise: Jerry loved seeing animals at the zoo. 
 Initial Context: His favorite was the giraffe. 
 Original Ending: He watched them graze on the grass. The walked through the brush and nibbled on the trees. He watched them until they were out of sight. 
 Counterfactual Context: His favorite was the snakes.
Output (English): He watched them slither on the grass. They slithered through the brush and under the trees. He watched them until they were out of sight.