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: A thing arranged in clusters mostly contain instructions for a single protein. 
Question: How often does a thing arranged in clusters contain instructions for a single protein?
Example Output: mostly.

Example Input: Fact: A car engine converts a fuel of hydrocarbons into motion through combustion. 
Question: A car engine uses what to aid in combustion?
Example Output:
hydrocarbons.