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: Bill drove his car home after work. He felt a rattle and shake from the front of the car. Bill pulled over to see what it was. He saw that he had a flat tire. Bill changed the tire and drove home.
Why did Bill change the tire?

Answerable