Task: Story Composition
Input (English): Premise: Sam saw that his dog was scratching a lot. 
 Initial Context: He took a close look at his dog's coat and saw tiny bugs. 
 Original Ending: He called the vet who prescribed the dog some medication. Sam gave him the dog the medication. A few day later his dog stopped scratching. 
 Counterfactual Context: His dog had eczema.
Output (English): He called the vet who prescribed the dog some medication. Sam gave the dog the medication. A few day later his dog stopped scratching.