Task: Story Composition
Input (English): Premise: Sammy wanted a toy truck to play with. 
 Initial Context: His mommy told him she would try to buy him one. 
 Original Ending: On his birthday he got a cake, but no toy truck! He tried to act happy as he went upstairs to bed that night. Then he saw, on his bed, a brand new toy truck waiting for him! 
 Counterfactual Context: His mommy told him he could play with his brother's truck.
Output (English): On his birthday he was hoping for his own truck. He didn't get one, and tried to act happy as he went upstairs to bed that night. Then he saw, on his bed, a brand new toy truck waiting for him!