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: Which is a complete circuit? Answer: a refrigerator that is running.
Example Output: a complete electrical circuit is a source of electrical energy

Example Input: Question: Gills are used by what for breathing water? Answer: marlins.
Example Output: gills are used for breathing water by aquatic animals

Example Input: Question: A way to illuminate a dark study is to? Answer: introduce a spark to a wick.
Example Output:
a candle is a source of light when it is burned