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: Ben had to cram information for an exam tomorrow. He spent all night studying since he didn't start yet. Around 5 am, he started to get dressed for school. When he arrived, he walked carelessly to class. He kept falling asleep during the test since he didn't sleep well.
Why did He spend all night?

Answerable