Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Bob was a computer scientist. He enjoyed natural language processing. He decided to revolutionize the industry! He formulated a machine learning algorithm to process words. He won the nobel prize for his work!
Why did He formulate a machine?
Solution: Answerable
Reason: He formulated a machine learning algorithm to process words.

Now, solve this instance: Charles and Greg rolled dice for money at home. Greg had an idea, to go to Las Vegas and shoot craps. In Las Vegas, they quickly learned the rules of the crap tables. They both found gambling in Las Vegas better than home. After 24-hours of smart gambling, together, they had $50,000.
Why had Greg an idea?
Student:
Not Answerable