Task: Story Composition
Input (English): Premise: Billy mom was always after him to tie his shoelaces. 
 Initial Context: She kept warning him he was going to trip. 
 Original Ending: He never paid attention to her. One day at school he tripped as he was walking down the stairs. He ended up breaking his leg. 
 New ending: He never paid attention to her though. One day at school he tripped as he was walking down the stairs. He ended up breaking his leg. 
Output (English): She was successful in teaching Billy how to tie his shoelaces.