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: I was hiking in a forest. I had to cross a stream. I decided to build a bridge out of dead wood. I started to cross the bridge. The bridge collapsed and I fell into the stream.
Why did I start to cross the bridge?

Answerable