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Which Nintendo product was first released in 1980?

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On which planet in our solar system do the strongest winds blow?

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How large was the maximum magnification of Antoni van Leeuwenhoek's microscope?

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How many people speak Mandarin Chinese as their mother tongue?

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In which year did women first in the world receive the right to vote in national elections?

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Which river flows through the most countries in the world?

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Which land animal has the most powerful heart in proportion to its body?

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In which country were the first official Olympic Winter Games held?

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Which invention by Edison changed the world in 1879?

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