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: Sedge wrens are listed as endangered by all ____ states.

Answer: three


Question: Marine biologists have ____ theories on why whales breach.

Answer: two


Question: Many flightless birds have only ____ toes, the African ostrich but two.

Answer:
three