Task: Story Composition
Input (English): Premise: Johnny is a pitcher for his baseball team. 
 Initial Context: He had a big game last week and he needed to practice his pitches. 
 Original Ending: He had to learn how to throw a curveball. He didn't know how, so he spent a whole month practicing. He learned how to throw a curveball and his team won the game! 
 Counterfactual Context: He threw the best curveballs.
Output (English): He had to learn how to throw a changeup. He didn't know how, so he spent a whole month practicing. He learned how to throw a changeup and his team won the game!