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: Onychomycosis affect the protective plates over the ends of fingers. 
Question: What can affect the protective layers over the fingers?
Example Output: Onychomycosis.

Example Input: Fact: thirst is used to make an animal realize that it needs to replenish H2O in its body. 
Question: Thirst shows an animal that it needs what?
Example Output: H2O.

Example Input: Fact: gravitational pull of the moon causes waves. 
Question: What does the gravitational pull of the moon cause?
Example Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
waves.

