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: Biennials require portions of ____ growing seasons to reproduce.

Answer: two


Question: Narwhals have ____ teeth in their upper jaw.

Answer: two


Question: Urinary incontinence costs ____ billion dollars a year in direct and indirect costs.

Answer:
ten