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: 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?

Output: body.


Input: Consider Input: Fact: The wind has a negative impact on the respiratory system. 
Question: The wind has a negative impact on what?

Output: the respiratory system.


Input: Consider Input: Fact: paper can change shape from smooth into compacted by physical force. 
Question: What can change shape from smooth into compacted by physical force?


Output: paper.