Task: Story Composition
Input (English): Premise: Tim was hit by a car while crossing the street. 
 Initial Context: Then the car sped off! 
 Original Ending: Luckily, a witness had seen it all. The cops tracked down the driver that hit Tim. She was arrested and thrown in jail. 
 Counterfactual Context: The the car stopped to help.
Output (English): There was also a witness who had seen it all. The cops spoke to the driver that hit Tim. She was arrested and thrown in jail.