Task: Story Composition
Input (English): Premise: Fred took his dog to the dog park. 
 Initial Context: He let his dog loose once they were in the leash free area. 
 Original Ending: Fred's dog played Frisbee and fetch with all of the other dogs! Soon, the sun started to go down. Fred called his dog, put the leash on him, and they went home. 
 Counterfactual Context: He left his dog on the leash.
Output (English): Fred's dog wanted to play Frisbee and fetch with all of the other dogs! Soon, the sun started to go down. Fred commanded his dog, and they went home.