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: loud noises can cause animals to become dangerous. 
Question: What can cause animals to become dangerous?
Example Output: Loud noises.

Example Input: Fact: A bicycle is a vehicle that requires smooth surfaces. 
Question: What kind of surface does a bicycle require to ride on?
Example Output: smooth.

Example Input: Fact: animals hunt prey in order to eat. 
Question: animals hunt prey for what reason?
Example Output:
to eat.