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.

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

Ex Output:
one-celled animals.


Ex Input:
Fact: Blood is a fluid tissue that delivers oxygen and nutrients to other tissues. 
Question: What delivers oxygen and nutrients to other tissues?

Ex Output:
Blood.


Ex Input:
Fact: wolves use sound to warn other wolves. 
Question: How do wolves warn other wolves?

Ex Output:

sound.