Task: Story Composition
Input (English): Premise: Sam was walking his dog. 
 Initial Context: All of a sudden a loud sound scared the dog. 
 Original Ending: It ran away. Sam looked for hours before going home Sam's dog was at home waiting for him. 
 Counterfactual Context: They then went home.
Output (English): His dog got loose from the leash on the way back and ran away. Sam looked for hours before going home Sam's dog was at home waiting for him.