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: Phoenix is a city where about one in ____ residents are from an emerging ethnic group.

Answer: four


Question: Ostriches come in at least ____ breeds.

Answer: two


Question: Chronic insomnia refers to sleep difficulty at least ____ nights per week for one month or more.

Answer:
three