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

Output: one-celled animals.


Input: Consider Input: Fact: The sun provides energy. 
Question: What does the sun provide to make steam?

Output: Energy.


Input: Consider Input: Fact: When steel conducts heat, the steel expands. 
Question: What expands when it conducts heat?


Output: steel.