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: Naiads have ____ caudal filaments and external gills.

Answer: two

Question: Clovers occasionally have leaves with ____ leaves, instead of the usual three.

Answer: four

Question: Cancer affects ____ in three individuals.

Answer:
one