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"extract": "Guglielmo Giovanni Maria Marconi, 1st Marquess was an Italian radio-frequency engineer, inventor, and politician known for his creation of a practical radio wave-based wireless telegraph system. This led to his being largely credited as the inventor of radio and sharing the 1909 Nobel Prize in Physics with Ferdinand Braun \"in recognition of their contributions to the development of wireless telegraphy.\"",
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"extract": "Guglielmo Giovanni Maria Marconi, 1st Marquess was an Italian radio-frequency engineer, inventor, and politician known for his creation of a practical radio wave-based wireless telegraph system. This led to his being largely credited as the inventor of radio and sharing the 1909 Nobel Prize in Physics with Ferdinand Braun \"in recognition of their contributions to the development of wireless telegraphy.\"",
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"extract": "Wireless telegraphy or radiotelegraphy is the transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy, information is transmitted by pulses of radio waves of two different lengths called \"dots\" and \"dashes\", which spell out text messages, usually in Morse code. In a manual system, the sending operator taps on a switch called a telegraph key which turns the transmitter on and off, producing the pulses of radio waves. At the receiver the pulses are audible in the receiver\u0027s speaker as beeps, which are translated back to text by an operator who knows Morse code.",
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"text": "Guglielmo Marconi applies for a patent for his wireless telegraph.",
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"text": "Guglielmo Marconi applies for a patent for his wireless telegraph.",
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