Task: Story Composition
Input (English): Premise: David was shopping one day. 
 Initial Context: He see's a sign for the powerball. 
 Original Ending: He decides to buy a ticket. He goes home and goes to sleep. The next day he wakes up and checks his ticket and won! 
 Counterfactual Context: He see's a sign for the carnival.
Output (English): He decides to buy a ticket. He spends all day there, then goes home and goes to sleep. The next day he wakes up and sees that his ticket allows admission for a second day!