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: Bill took his Mother out to the casino yesterday. Bill won a jackpot on a slot machine. He split the winnings with his Mother. On the way home, they stopped at their favorite pizza place. Bill can't wait to go back and gamble again.
Why did Bill win a jackpot?

Not Answerable