Task: Story Composition
Input (English): Premise: Tennis always seemed like a challenging sport to Mary. 
 Initial Context: That's the very reason she decided to start playing. 
 Original Ending: At first, she kept launching the ball out of the court. She quickly realized it was a game of finesse and power. Slowly but surely, Mary got the hang of the game. 
 Counterfactual Context: She decided not to learn to play.
Output (English): She changed and her mind and gave tennis a shot, and she kept launching the ball out of the court. She quickly realized it was a game of finesse and power. Slowly but surely, Mary got the hang of the game.