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: Creatures with feathers and wings have a large brain relative to the size of their body. 
Question: Creatures with feathers and wings have a large brain relative to the size of their what?
Example Output: body.

Example Input: Fact: The cause of smallpox is usually thought to be nonliving. 
Question: Many believe the cause of smallpox to be what?
Example Output: Nonliving.

Example Input: Fact: cilia wave to move. 
Question: what move by waving?
Example Output:
cilia.