instruction:
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.
question:
Fact: A protein-rich fluid leaks into spaces between cells. 
Question: A protein-rich what leaks into spaces between cells?
answer:
fluid.


question:
Fact: carcinogens can cause death. 
Question: What can cause death?
answer:
carcinogens.


question:
Fact: earth being tilted on a rotating axis cause temperature changes. 
Question: What does the earth being tilted on a rotating axis cause?
answer:

Temperature changes.