Task: Story Composition
Input (English): Premise: Tim liked to ride his bike. 
 Initial Context: But the chain came off as he was riding it. 
 Original Ending: He had to tell his friend that he couldn't make it to his house. His older brother came driving by and saw Tim. He took Tim and his bike the rest of the way to the friends house. 
 Counterfactual Context: The chain never came off when he was riding.
Output (English): He called to tell his friend that he was too tired to make it to his house. His older brother came driving by and saw Tim. He took Tim and his bike the rest of the way to the friends house.