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: Burning fuel in furnaces can kill. 
Question: Burning fuel in a furnace can?
kill.

Fact: moist air falls on the windward side of a mountain. 
Question: Where does moist air fall on a mountain?
windward side.

Fact: Molecules of a person's genetic fingerprint are encoded with instructions that tell cells what to do. 
Question: Molecules of what are encoded with instructions that tell cells what to do?

A person's genetic fingerprint.