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.

Input: Consider Input: Fact: phones require electrical energy to function. 
Question: What do phones require to function?

Output: electrical energy.


Input: Consider Input: Fact: The cause of smallpox is usually thought to be nonliving. 
Question: Many believe the cause of smallpox to be what?

Output: Nonliving.


Input: Consider Input: Fact: one-celled animals make humans sick when they become parasites. 
Question: what can make humans sick when they become parasites?


Output: one-celled animals.