I know that the answer to the question "How is the wave measured?" is in "For example, at 30 MHz (10 m wavelength) a true resonant 14-wavelength monopole would be almost 2.5 meters long, and using an antenna only 1.5 meters tall would require the addition of a loading coil. Then it may be said that the coil has lengthened the antenna to achieve an electrical length of 2.5 meters. However, the resulting resistive impedance achieved will be quite a bit lower than the impedance of a resonant monopole, likely requiring further impedance matching. In addition to a lower radiation resistance, the reactance becomes higher as the antenna size is reduced, and the resonant circuit formed by the antenna and the tuning coil has a Q factor that rises and eventually causes the bandwidth of the antenna to be inadequate for the signal being transmitted. This is the major factor that sets the size of antennas at 1 MHz and lower frequencies.". Can you tell me what it is?
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Answer: using an antenna

I know that the answer to the question "Who was not a painter and benefited from the Moulin Rouge?" is in "The music hall and cabaret are famous Paris institutions. The Moulin Rouge was opened in 1889. It was highly visible because of its large red imitation windmill on its roof, and became the birthplace of the dance known as the French Cancan. It helped make famous the singers Mistinguett and Edith Piaf and the painter Toulouse-Lautrec, who made posters for the venue. In 1911, the dance hall Olympia Paris invented the grand staircase as a settling for its shows, competing with its great rival, the Folies Bergere, Its stars in the 1920s included the American singer and dancer Josephine Baker. The Casino de Paris presented many famous French singers, including Mistinguett, Maurice Chevalier, and Tino Rossi. Other famous Paris music halls include Le Lido, on the Champs-Elysees, opened in 1946; and the Crazy Horse Saloon, featuring strip-tease, dance and magic, opened in 1951. The Olympia Paris has presented Edith Piaf, Marlene Dietrich, Miles Davis, Judy Garland, and the Grateful Dead. A half dozen music halls exist today in Paris, attended mostly visitors to the city.". Can you tell me what it is?
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Answer: Mistinguett and Edith Piaf

I know that the answer to the question "What replaced gas street lights across the country near the end of the 19th century?" is in "During 1889, Thomas Edison had business interests in many electricity-related companies: Edison Lamp Company, a lamp manufacturer in East Newark, New Jersey; Edison Machine Works, a manufacturer of dynamos and large electric motors in Schenectady, New York; Bergmann & Company, a manufacturer of electric lighting fixtures, sockets, and other electric lighting devices; and Edison Electric Light Company, the patent-holding company and the financial arm backed by J.P. Morgan and the Vanderbilt family for Edison's lighting experiments. In 1889, Drexel, Morgan & Co., a company founded by J.P. Morgan and Anthony J. Drexel, financed Edison's research and helped merge those companies under one corporation to form Edison General Electric Company which was incorporated in New York on April 24, 1889. The new company also acquired Sprague Electric Railway & Motor Company in the same year.". Can you tell me what it is?
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Answer:
electric lighting devices