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: Reds can benefit from ____ to nine years' aging .

Answer: seven


Question: Irrigated land is almost ____ times as productive as rainfed cropland.

Answer: three


Question: Salt is made of ____ different atoms.

Answer:
two