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: Jack stole a small boy's bike. The boy couldn't stop him, because he was so small. Jack only made it to the curb, when he was stopped by another boy. It was the small boy's brother, who was not small at all. Jack returned the bike, and hasn't stolen any since.
Why did Jack steal a small boy 's bike?

Not Answerable