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: a polar bear requires extremely low humidity. 
Question: what does a polar bear require?
Example Output: extremely low humidity.

Example Input: Fact: if graptolites are found in a place then that place used to be covered by water. 
Question: what are found in place to indicate a place used to be covered by water?
Example Output: graptolites.

Example Input: Fact: Most mussels have shells. 
Question: What do most mussles have?
Example Output:
shells.