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: astronauts require dehydrated food for extended flights. 
Question: astronauts require what food for extended flights?
Example Output: dehydrated.

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

Example Input: Fact: tidal caves can produce electricity. 
Question: what can produce electricity?
Example Output:
tidal caves.