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: small capillaries collect fluid. 
Question: What collects fluid?

Ex Output:
small capillaries.


Ex Input:
Fact: insects are in the largest phylum of invertebrates. 
Question: What are in the largest phylum of invertebrates?

Ex Output:
insects.


Ex Input:
Fact: A breathing mask is used for keeping air pollution from the respiratory system. 
Question: What does a gas mask keep out?

Ex Output:

air pollution.