character: Guglielmo Marconi
topic: Impact of Edison and Tesla's rivalry on radio technology
grade: 8
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character: Thomas Edison
topic: Influence on early electrical inventions
grade: 8
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character: Nikola Tesla
topic: Development of alternating current and its impact on communication
grade: 8
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character: Guglielmo Marconi
topic: Pioneering work in wireless telegraphy
grade: 8
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