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: Irradiating food can be used to kill something that causes fermentation in the food. 
Question: Irradiating food can be used to kill what in the food?
Example Output: Something that causes fermentation.

Example Input: Fact: vein deposits of gold and silver are formed by granite. 
Question: what are vein deposits of gold and silver formed by?
Example Output: granite.

Example Input: Fact: Solar-powered LED lights require electrical energy to produce light at night. 
Question: In order to operate at night, solar-powered LED lights require what?
Example Output:
electrical energy.