Task: Story Composition
Input (English): Premise: Bob decided to go to his friend's Halloween party as baby. 
 Initial Context: He didn't feel like doing too much work on a costume. 
 Original Ending: So he took a white sheet, fashioning a diaper. Six of his friends had the same idea. They were all babies, too, just wearing a sheet as a diaper. 
 Counterfactual Context: He bought an elaborate baby costume.
Output (English): What he did was he took a white sheet, fashioning a diaper. One of his friends had the same idea. They both had ghost babies wearing a sheet as a diaper.