Task: Story Composition
Input (English): Premise: Bill's mom was constantly telling him to tie his shoes. 
 Initial Context: He never listed to her, he just rolled his eyes. 
 Original Ending: As he was walking down the stairs at school, he tripped on his laces. He fell down a whole flight of stairs. He had to wear a cast on his broken arm for six weeks. 
 Counterfactual Context: He always listened to her, and tied his shoes.
Output (English): As he was walking down the stairs at school, he didn't notice his shoes had come untied, and he tripped on his laces. He fell down a whole flight of stairs. He had to wear a cast on his broken arm for six weeks.