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: Dan realized he never should have let her go. He called her to tell her he was wrong. She wouldn't take any of Dan's calls. Dan's broken heart knew no solace. He threw himself off a bridge and died when he hit the water.
Why did Dan realize he never should have let her go?

Not Answerable