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: preventing the transfer of energy from an organism's body causes it to keep warm. 
Question: what can preventing the transfer of cause the body to keep warm in an organism?

Ex Output:
energy.


Ex Input:
Fact: Scraping oneself on surfaces or things that have germs may cause infection. 
Question: Which of the following may cause infection?

Ex Output:
Germy surfaces.


Ex Input:
Fact: when a metal contains iron oxide, it becomes orange on the surface. 
Question: what causes metal to be orange on the surface?

Ex Output:

iron oxide.