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.
Q: For Christmas, Rodger got a gift card. It was going to expire soon. He went to the store to redeem it. He chose a book. Then, he bought it with the card.
Why did He choose a book?
A: 
Not Answerable