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: Chemicals created a hole in the ozone over Antarctica. 
Question: What creates a hole in the ozone?
Example Output: Chemicals.

Example Input: Fact: Beavers cause ponds and lakes to form. 
Question: What can be the cause of lakes and ponds forming?
Example Output: beavers.

Example Input: Fact: Radioactive dating helps figure out the age of dinosaurs found today. 
Question: How can we figure out how long a dinosaur has been dead?
Example Output:
Radioactive dating.