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: rain can break down rocks into smaller pieces. 
Question: What can rain do to rocks?
Example Output: Break down.

Example Input: Fact: predicting weather requires meteorology. 
Question: What requires meteorology?
Example Output: predicting weather.

Example Input: Fact: spread of disease is another potential threat in the environment. 
Question: spread of what is another potential threat in the environment?
Example Output:
disease.