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: Oliver had a pet fish. He noticed that one fish seemed almost pregnant. One day, little baby fish appeared in the tank. His fish had had babies! Oliver named all of the fish and loved them all.
Why did He notice that one fish seemed almost pregnant?

Not Answerable