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: Genes are molecules that contain a single protein. 
Question: what are molecules that contain a single protein?
Example Output: genes.

Example Input: Fact: locusts spread disease and destroy crops. 
Question: What spreads disease and destroy crops?
Example Output: locusts.

Example Input: Fact: a flow of electrons running through a wire causes that wire to heat up. 
Question: what can run through a wire causing it to heat up?
Example Output:
flow of electrons.