Task: Story Composition
Input (English): Premise: Nadine set up the Christmas tree. 
 Initial Context: She strung the lights up first. 
 Original Ending: Then, she strung some popcorn on it. After that, she added ornaments, candy canes and tinsel. Finally she put a star on top. 
 Counterfactual Context: But, she couldn't find the lights.
Output (English): So, she strung some popcorn on it. After that, she added ornaments, candy canes and tinsel. Finally she put a star on top.