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: Eggs are fertilized during reproduction. 
Question: What happens during reproduction?
Example Output: eggs are fertilized.

Example Input: Fact: most bigger cities require vehicles. 
Question: What do most bigger cities require?
Example Output: vehicles.

Example Input: Fact: deuterostomes can have a water vascular system with tube feet. 
Question: What can have a water vascular system with tube feet?
Example Output:
deuterostomes.