Task: Story Composition
Input (English): Premise: Andrew made a pizza. 
 Initial Context: His roommate was very hungry, so he stole a slice. 
 Original Ending: His roommate discovered that the pizza had not been fully cooked. He began to gag. Andrew laughed at his roommate's misfortune. 
 Counterfactual Context: He offered his roommate a slice but he declined.
Output (English): His roommate discovered that the pizza was delicious. He began to eat. Andrew laughed at his roommate's gesture.