Task: Story Composition
Input (English): Premise: Nathan dove into the pool. 
 Initial Context: He over rotated his body during the dive. 
 Original Ending: He hit the water on his back. The lifeguard heard the noise. The lifeguard jumped into the pool to help Nathan. 
 Counterfactual Context: He kept his body in perfect form during the dive.
Output (English): He hit the water on his head. The lifeguard watched. The lifeguard jumped into the pool to congratulate Nathan.