Task: Story Composition
Input (English): Premise: Mike was working out his back. 
 Initial Context: He had a good workout. 
 Original Ending: The next day, his back started hurting. He decided to stop working out for a while. He needed to let it heal. 
 Counterfactual Context: He asked a trainer to help making sure he was doing it properly.
Output (English): The next day, his back started hurting. He decided to stop working out for a while. He needed to let it heal.