Task: Story Composition
Input (English): Premise: Sam was riding her bike. 
 Initial Context: She was going really fast down the sidewalk. 
 Original Ending: A dog jumped out in front of her. Sam flipped over her handlebars. Sam broke her wrist. 
 Counterfactual Context: She was walking her bike up a hill.
Output (English): A dog jumped out in front of her while she was walking her bike up the hill. Sam slipped and fell. Sam broke her wrist.