In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

Example Input: Question: A fan pushes air with? Answer: rotating flat surface.
Example Output: the vanes rotating in an electric fan causes air to move

Example Input: Question: An early example of harnessing wind power would be? Answer: cloth on masts.
Example Output: wind is a source of energy

Example Input: Question: Humidity is the amount of what vapor in the air? Answer: h2o.
Example Output:
humidity is the amount of water vapor in the air