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.

Question: Which is a byproduct of a lightbulb? Answer: warmth.
an incandescent light bulb converts electricity into heat by sending electricity through a filament

Question: Perspiration leaving the torso through evaporation helps? Answer: cool it down.
sweat cools a body

Question: The biggest things on the moon are? Answer: craters.

the lunar surface contains many craters