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.

Fact: a mold spore has a negative impact on breathing. 
Question: A mold spore has a negative impact on what?
breathing.

Fact: nerve receptors in the skin sense temperature and pain. 
Question: what in the skin sense temperature and pain?
nerve receptors.

Fact: Barn swallows travel long distances. 
Question: An animal that travels long distances is?

a barn swallow.