Task: Story Composition
Input (English): Premise: Mary misplaced her car keys. 
 Initial Context: Mary left late for work. 
 Original Ending: The highway out there only had light traffic. There was a parking spot right near the front. Mary arrived at work on time. 
 Counterfactual Context: Mary had to miss work since she had no way else of getting there.
Output (English): There were no buses nearby. She had no friends to give her a ride. Mary made a call to get new keys.