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: Food can be cooked on metal. 
Question: Which surface can food be cooked on?

Output: Metal.


Input: Consider Input: Fact: the excretory system is part of the life process. 
Question: What is part of the life process?

Output: Excretory system.


Input: Consider Input: Fact: Genetic diversity can be maintained when individuals move into or out of a population. 
Question: What can be maintained when individuals move into or out of a population?


Output: genetic diversity.