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: Phenotypic expression of skin color varies over a wide range. 
Question: Phenotypic what of skin color varies over a wide range?
Example Output: expression.

Example Input: Fact: cell division is how humans grow and repair themselves. 
Question: what uses cell division to grow and repair themselves?
Example Output: humans.

Example Input: Fact: Billions of seeds can be spread by moving wind, other organisms, or water. 
Question: What is one way billions of seeds be spread by?
Example Output:
wind.