Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

Example Input: Fact: Absorbing energy causes metal objects to expand. 
Question: Metal expands when it does what?
Example Output: absorbs energy.

Example Input: Fact: Nests are used to protect eggs from predators and extreme temperatures. 
Question: What are used to protect eggs from predators and extreme temperatures?
Example Output: nests.

Example Input: Fact: a wheeled vehicle requires less friction. 
Question: What is something that helps wheeled vehicles move?
Example Output:
Reduced friction.