Task: Story Composition
Input (English): Premise: Drew was running towards a tree. 
 Initial Context: He tried to swing on a branch that he caught. 
 Original Ending: However, the branch broke. Drew fell on his back. He was sore for the past week. 
 Counterfactual Context: He tried to run as fast as he could.
Output (English): However, he tripped. Drew fell on his back. He was sore for the past week.