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.

[Q]: Question: It's most likely to rain when the color of the sky looks? Answer: dark and Silvery.
[A]: grey clouds appear before precipitation

[Q]: Question: soil is formed by? Answer: animals stepping on dead leaves and crushing it into bits.
[A]: soil is formed by rocks eroding

[Q]: Question: Which is the source of a nonrenewable resource? Answer: oil deposits.
[A]:
plastic is a nonrenewable resource