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: astronauts require dehydrated food for extended flights. 
Question: astronauts require what food for extended flights?
Example Output: dehydrated.

Example Input: Fact: Physical changes cause solids to form. 
Question: What causes solids to form?
Example Output:
Physical changes.