What is the hardest known naturally occurring mineral?

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In Shakespeare's play who was the wife of Othello?

What was renamed to Ho Chi Minh City in 1975?

What modern country includes the ancient region of Mesopotamia?

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The Potomac River empties into what bay?

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According to the song what did my true love give to me on the fifth day of Christmas?

What line divided the North and South in the US Civil War?

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The Republic of Benin shares a border with which other African country to the east?