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: the excretory system is part of the life process. 
Question: What is part of the life process?
Example Output: Excretory system.

Example Input: Fact: muscles contain cells. 
Question: What do muscles contain?
Example Output: cells.

Example Input: Fact: ferns are helped by wind in reproduction. 
Question: What helps ferns in reproduction?
Example Output:
wind.