Task: Story Composition
Input (English): Premise: Ben wanted a cake for his birthday. 
 Initial Context: He had no friends, so he decided to make his own. 
 Original Ending: He baked it from a box mix. Then he decorated it himself. Ben was pleased with his birthday cake. 
 Counterfactual Context: His friends made him a cake.
Output (English): They baked it from a box mix. Then they decorated it themselves. Ben was pleased with his birthday cake.