Task: Story Composition
Input (English): Premise: Andrew played catch with his son in their backyard. 
 Initial Context: He threw the ball forcefully overhead. 
 Original Ending: To his surprise, it went much farther than he expected. His son marveled at his father's strength. Andrew felt proud before running to retrieve the ball. 
 Counterfactual Context: They threw the ball gently.
Output (English): To his surprise, it went much farther than he expected. His son marveled at his father's strength. Andrew felt guilty before running to retrieve the ball.