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: One-celled animals can be partially classified on the basis of how they move. 
Question: Movement is one classification method for what?
Example Output: one-celled animals.

Example Input: Fact: Monotremes lay eggs. 
Question: What is the distinguishing feature of monotremes?
Example Output: They lay eggs.

Example Input: Fact: Fats may consist of fatty acids alone, or they may contain other molecules as well. 
Question: What can fats consist of?
Example Output:
fatty acid.