Task: Story Composition
Input (English): Premise: Katy knew it was naughty, but one night she stayed up for Santa. 
 Initial Context: To her surprise, she saw her parents eating Santa's cookies. 
 Original Ending: It was just to test them, they explained, and put her in bed. When she woke up, Santa had brought presents and eaten his cookies! It had all happened just like Mommy and Daddy said! 
 New ending: It was just to test them, he explained, and put her in bed. When she woke up, Santa had brought presents and eaten his cookies! It had all happened just like her brother said! 
Output (English): To her surprise, she saw her brother eating Santa's cookies.