Task: Story Composition
Input (English): Premise: Mary was sitting at home alone. 
 Initial Context: She heard the phone ring. 
 Original Ending: She answered the phone after a few rings. It was her mother on the phone. Mary talked to her mother for about an hour. 
 New ending: She answered the door after a few knocks. It was her mother at the door. Mary talked to her mother for about an hour. 
Output (English): She heard someone knock on the door.