Task: Story Composition
Input (English): Premise: Mark was listening to his favorite song. 
 Initial Context: He thought it could be funny to play it backwards. 
 Original Ending: He opened up some editing software. Then, he played the song backwards. It sounded really lame, and Mark stopped. 
 Counterfactual Context: he thought it is very interesting to play it backwards.
Output (English): He opened up some editing software. Then, he played the song backwards. It sounded really cool, and Mark continued.