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: Ospreys mature after ____ years of age.

Answer: two


Question: Mental illness enters the lives of at least one in ____ families.

Answer: four


Question: Airplanes have ____ magnetos for safety reasons.

Answer:
two