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.

Input: Consider Input: Fact: ears are used for hearing. 
Question: What are ears used for?

Output: to hear.


Input: Consider Input: Fact: blood traveling to the heart is deoxygenated. 
Question: Blood traveling to the heart is?

Output: deoxygenated.


Input: Consider Input: Fact: temperature and moisture varies by alltitude. 
Question: what varies by altitude?


Output: temperature and moisture.