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: fish need to be cooled. 
Question: what needs to be cooled?

Output: fish.


Input: Consider Input: Fact: proteins contain genes. 
Question: what do proteins contain?

Output: genes.


Input: Consider Input: Fact: Female sex cells require warmth to survive. 
Question: What requires warmth to survive?


Output: female sex cells.