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: conserving water can be used for survival in a desert. 
Question: Where is conserving water useful for survival?
Example Output: desert.

Example Input: Fact: predicting weather requires meteorology. 
Question: What requires meteorology?
Example Output: predicting weather.

Example Input: Fact: Reptiles are a class of tetrapod vertebrates that produce eggs with a waterproof shell. 
Question: Reptiles are a class of tetrapod vertebrates that produce eggs with what?
Example Output:
waterproof shell.