Task: Story Composition
Input (English): Premise: Cayla borrowed 20 books from the library. 
 Initial Context: She gave her husband 5 books to return. 
 Original Ending: He drove to the library after hours. So he had to drop the books into the dropbox. Now Cayla has 15 books that need to be returned. 
 Counterfactual Context: She gave her husband 2 books to return.
Output (English): He drove to the library after hours. So he had to drop the books into the dropbox. Now Cayla has 18 books that need to be returned.