Task: Story Composition
Input (English): Premise: Keith liked to tinker with pizza toppings. 
 Initial Context: One day, he made his own pepperoni. 
 Original Ending: He put a generous amount on the pizza. His family gobbled it up. They said it was his best pizza yet. 
 Counterfactual Context: One day, he ordered pepperoni.
Output (English): He asked for a generous amount on the pizza. His family gobbled it up. They said it was the best pizza yet.