Task: Story Composition
Input (English): Premise: It was Elizabeth's birthday. 
 Initial Context: She had been looking forward to her chocolate cake all day. 
 Original Ending: When it came time to eat, her mom brought a cake out. The cake turned out to be vanilla. Elizabeth was disappointed, but she still appreciated it. 
 Counterfactual Context: She had been looking forward to her vanilla cake all day.
Output (English): When it came time to eat, her mom brought a cake out. The cake turned out to be chocolate. Elizabeth was disappointed, but she still appreciated it.