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: The pituitary gland regulates the metabolic rate in the body. 
Question: What gland helps regulate the metabolic rate in the body?
Example Output: Pituitary gland.

Example Input: Fact: space exploration is not possible without navigation. 
Question: What is used for space exploration?
Example Output: navigation.

Example Input: Fact: Blowing air into a whistle causes air to move inside the whistle. 
Question: Blowing air into what causes air to move inside it?
Example Output:
whistle.