Democracy dates back to have started to develop in the days of Ancient Greece in the city state of Athens.
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Jackie Robinson did when he signed a contract with the Brooklyn Dodgers
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In mathematics, the Pythagorean theorem, also known as Pythagoras' theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle. It states that the square of the hypotenuse is equal to the sum of the squares of the other two sides.
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-Austint1414