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 heart stopping pumping can cut off oxygen to cells. 
Question: What can cut off the oxygen to cells?
Example Output: the heart stopping.

Example Input: Fact: In the puberty stage is a time of significant mental, emotional and social change. 
Question: What is a time of significant mental and emotional change?
Example Output: puberty.

Example Input: Fact: Sponges have specialized cells that line the interior chambers. 
Question: What lines a sponge's interior chambers?
Example Output:
specialized cells.