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: Repellents can stop harm caused by flea bites. 
Question: How can you prevent harm caused by flea bites?
Example Output: Using repellent.

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: some aerosols can decrease temperatures by blocking the sun. 
Question: some aerosols can decrease temperatures by blocking what?
Example Output:
the sun.