Task: Story Composition
Input (English): Premise: Jackson wanted to run a half-marathon. 
 Initial Context: He started to train everyday. 
 Original Ending: He soon was able to run faster than his friends. He participated in the half-marathon with his friends. He beat all of them to the finish line. 
 Counterfactual Context: He twisted an ankle while training and had to drop out.
Output (English): Soon his friends were running much faster than him. He went to the half-marathon to cheer on his friends. They all made it to the finish line.