Task: Story Composition
Input (English): Premise: Aaron has a puppy named Max. 
 Initial Context: He walks Max every day. 
 Original Ending: Max got loose during their walk yesterday. Aaron decided to put up posters. A neighbor saw the poster and returned Max! 
 Counterfactual Context: Max always stayed right at Aaron's side.
Output (English): Max ran off while Aaron's young sister took him for a walk. Aaron decided to put up posters. A neighbor saw the poster and returned Max!