Task: Story Composition
Input (English): Premise: Ava was roller skating one day. 
 Initial Context: Suddenly she tripped on a rock. 
 Original Ending: She pitched forward and landed on her leg. A huge gash opened on her knee! Ava had to rush to the hospital for stitches. 
 Counterfactual Context: She wore a helmet and knee pads.
Output (English): She pitched forward and landed on her leg. The knee pad protected her knee! Ava continued to roller skate but more carefully.