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: bottom dwelling organisms can be filter feeders. 
Question: What can bottom dwelling organisms be?
Example Output: filter feeders.

Example Input: Fact: mammals can generate heat by muscle action. 
Question: What can mammals generate heat with?
Example Output: Muscle action.

Example Input: Fact: A saline solution is made by adding salt to water. 
Question: What are the two ingredients of a saline solution?
Example Output:
salt and water.