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Traffic lights were the most important invention because it made the streets safer for people and for drivers who drive on the streets.
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Josephine Baker was the most important people in the world because she was the most famous women and dancer in the world.
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The most important event was the world broadcast series on the radio. People could listen to all of the sports news right from there home or car radios.
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Sound was so inportant in movies back then because people would understand the location, scene and the characters in the movie or TV show.
