Task: Story Composition
Input (English): Premise: Shawn is out shopping one day. 
 Initial Context: He needed a good pair of jeans at the Mall. 
 Original Ending: After buying his jeans he walks by an animal shop and sees a dog. Shawn falls in love with the dog at the store. Shawn buys the dog and the two become best friends. 
 Counterfactual Context: He bought cat food.
Output (English): While buying his cat food at the animal shop, he sees a dog. Shawn falls in love with the dog at the store. Shawn buys the dog and the two become best friends.