Task: Story Composition
Input (English): Premise: Jack had been eyeing a prize in his teacher's prize box all year. 
 Initial Context: But Bill earned a trip to the prize box first. 
 Original Ending: Bill picked the prize he knew Jack had wanted! When Bill saw how sad Jack looked, he felt guilty. Bill felt much better after he decided to give Jack the prize. 
 Counterfactual Context: Jack lucked out and finally won a trip to the prize box.
Output (English): But right before Bill picked the prize he knew Jack had wanted! When Bill saw how sad Jack looked, he felt guilty. Bill felt much better after he decided to give Jack the prize.