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.
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Question: Question: Dinosaur carcasses are a form of? Answer: fuel.

Answer: oil is a source of energy


Question: Question: The outer shell of our planet is made of? Answer: sedimentary formations.

Answer: Earth 's surface is made of rock


Question: Question: Water molecules descending from a high elevation in liquid form are known as? Answer: rainfall.

Answer:
precipitation is when water falls from the sky