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: muscles contain cells. 
Question: What do muscles contain?

Output: cells.


Input: Consider Input: Fact: Antigens are found on cells in skin melanoma. 
Question: Where can antigens be found?

Output: skin melanoma cells.


Input: Consider Input: Fact: optical tools are used for observing something listed alphabetically up close. 
Question: optical tools are used for observing something listed how up close?


Output: alphabetically.