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: navigation requires knowing which way to go. 
Question: What requires knowing which way to go?
Example Output: navigation.

Example Input: Fact: Bacteria can cause food to spoil. 
Question: What causes food to spoil?
Example Output: Bacteria.

Example Input: Fact: megaspores develop to produce eggs inside the ovaries of flowers. 
Question: what do megaspores develop to do?
Example Output:
produce eggs in flower ovaries.