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.

[EX Q]: Question: An example of a fossil is a paw print in what? Answer: hard stones.
[EX A]: An example of a fossil is a paw print in rock

[EX Q]: Question: A pot of water is ready to cook noodles when it is boiling, as noted by? Answer: bubble production.
[EX A]: boiling is when liquids are heated above their boiling point

[EX Q]: Question: who would see better through an underground tunnel? Answer: a man with a candle and match.
[EX A]:
a candle is a source of light when it is burned