Task: Story Composition
Input (English): Premise: Bill loved to gamble. 
 Initial Context: He beat Tom he could run faster than him. 
 Original Ending: The two raced down the street. Tom won the race. Now Bill has no money left. 
 Counterfactual Context: He bet Tom he could play darts better than him.
Output (English): The two threw the darts at the dartboard. Tom won the game. Now Bill has no money left.