Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.
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Question: Electric power means no gas or oil to spill, and ____ pollution in the air.

Answer: no


Question: Comprehension is the second of the ____ elements of the informed consent process.

Answer: three


Question: Heat moves in only ____ ways, by conduction, convection or radiation.

Answer:
three