Task: Story Composition
Input (English): Premise: Bob took his daughter Anna sledding for the first time. 
 Initial Context: She was hesitant and afraid. 
 Original Ending: But Bob sat behind her on the sled, and held her tight. Then he pushed them together down the hill. Anna screamed with joy as they raced downhill! 
 Counterfactual Context: She had never seen snow before and could not wait.
Output (English): Bob sat behind her on the sled, and held her tight. Then he pushed them together down the hill. Anna screamed with joy as they raced downhill!