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: AIDS infects and destroys helper T cells. 
Question: what infects and destroys helper T cells?
Example Output: AIDS.

Example Input: Fact: mammals keep warm with hair. 
Question: what do mammals keep warm with?
Example Output: hair.

Example Input: Fact: a sequence of characters may start with runoff or water seeping out of a spring. 
Question: a sequence of characters may start with runoff or what seeping out of a spring?
Example Output:
water.