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: Beryllium has ____ protons and four electrons.

Answer: four


Question: Manatees swim ____ to six miles per hour.

Answer: two


Question: Silver is ____ times more abundant than gold.

Answer:
ten