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: marine and benthic creatures lack respiratory and excretory systems. 
Question: what creatures lack respiratory and excretory systems?
Example Output: marine and benthic.

Example Input: Fact: when individuals move into or out of a population, it's random. 
Question: what is it when individuals move into or out of a population?
Example Output: random.

Example Input: Fact: One can hear when sonic waves cause the eardrum to vibrate. 
Question: What happens when sonic waves make eardrums vibrate?
Example Output:
One can hear.