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: Kayak paddles have ____ blades, canoe paddles have one.

Answer: two


Question: Death occurs after ingestion of ____ grams of quinine.

Answer: eight


Question: Sulfur plays ____ important roles in global change biology.

Answer:
two