Task: Story Composition
Input (English): Premise: Sam thought his truck was faster than all other trucks. 
 Initial Context: John felt the same about his truck. 
 Original Ending: One day they decided to race. John's motor blew up. Sam won the race. 
 Counterfactual Context: Sam challenged John to a race but they were busted by the cops just as they were getting ready to start.
Output (English): One day they decided to race again. John's motor blew up. Sam won the race.