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: An example of migration is? Answer: when flocks relocate.
[A]: An example of migration is birds flying south in the winter


[Q]: Question: The mounds at the beach are made of? Answer: silica.
[A]: sand dunes are made of sand


[Q]: Question: rocks often contain large amounts of? Answer: hard shiny alloy.
[A]:
rocks often contain large amounts of metal