What comedian has real-life twin sons named Matthew and Gregory?

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What four notes are represented on the four strings of a ukulele?

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Which impressionist featured his wife Camille, in "The Woman in the Green Dress"?

What book was written as a sequel to "The Adventures of Tom Sawyer"?

Who wrote the Science-fiction novel "The Time Machine"?

Suva is the capital of which country?

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On which river does Washington D.C. stand?

How much does the adult giraffe heart weigh?

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What kind of "pet sounds" are actually heard at the end of the Beach Boys album of that name?

According to Betsy Ross" family, what was the first American flag made from?

Who preceded Georges Pompidou as French President?

Which Verdi opera features the aria "La donna e mobile"?