Q: What Elmer A. Sperry invented?
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Q: What Galileo invented?
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Q: Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?
Q: What George Pullman invented?
Q: What Benjamin Franklin invented?
Q: What Henry Bessemer invented?
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