Definition: In this task you are given a story and a question regarding that story. You must judge whether the question is answerable based on the info given to you. Label the instances as "Answerable" or "Not Answerable" based on your judgment. the story and the question are separated by a new line character.
Input: Billy's family just moved to a new city. He was nervous to go to school and make new friends. At school, Billy was quiet and shy. Sarah came up to Billy and introduced herself. They became great friends.
Why did They become great friends?

Answerable