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: Joe ripped his backpack. He needed a new one. He went to Office Depot. They had only one in stock. Joe was able to nab it just in time.
Why did He need a new one?

A: Answerable
****
Q: Last night I had a dream about biking. I used to bike before I had a stroke in 2011. I can hardly walk, let alone bike. I dreamed I was gliding along on my bike. I woke up, bitterly disappointed.
Why did I dream I was gliding along on my bike?

A: Answerable
****
Q: Bob went to the store to buy shorts. He bought some purple shorts. His friends made fun of his shorts. Bob tried to return the shorts. Unfortunately, the store did not accept returns.
Why did He buy some purple shorts?

A:
Not Answerable
****