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 had a favorite teddy bear when he was a kid. Over the years he lost track of it and even forgot about it. When his mother passed away he went to her house to clean it up. He found a box in the attic that held his old teddy bear. He took it home to give to his daughter.
Why had Billy a favorite teddy bear?

Not Answerable