Task: Story Composition
Input (English): Premise: Greg ripped some pages out of a book. 
 Initial Context: He returned the book to the library. 
 Original Ending: Someone else borrowed that book. They couldn't read the missing pages. They would always wonder. 
 Counterfactual Context: He returned the book to the store.
Output (English): Someone else bought the book. They couldn't read the missing pages They would always wonder