paragraph_text: Sifton is a neighborhood of Vancouver in Clark County, Washington, United States along State Route 500. It is located within incorporated city boundaries. It is notable for being the terminus of an early electric trolley operated by the Northcoast Power Company that also served nearby Orchards from 1910 until 1926. The trolleys made ten stops and ran once per hour, charging 15 cents each way. A mural in the heart of Orchards depicts the trolley and the rural character of the area at the time it was operating.

paragraph_text: After independence on 5 July 1975, notes were issued for 100, 500, and 1000 escudos on 1 July 1977. The next series of notes was introduced in 1989 and consisted of 100, 200, 500, 1000 and 2500 escudos.

paragraph_text: Donald L. Bitzer (born January 1, 1934) is an American electrical engineer and computer scientist. He was the co-inventor of the plasma display, is largely regarded as the "father of PLATO", and has made a career of improving classroom productivity by using computer and telecommunications technologies.

paragraph_text: The men's C-1 500 metres event was an open-style, individual canoeing event conducted as part of the Canoeing at the 1992 Summer Olympics program.

paragraph_text: First Electric Cooperative is a non-profit rural electric utility cooperative headquartered in Jacksonville, Arkansas. The cooperative was organized April 26, 1937, as the first electric cooperative in Arkansas under the federal Rural Electrification Act of 1935. The cooperative energized its first lines April 15, 1938, near Jacksonville with three employees and 150 members.

paragraph_text: The first successful classical unified field theory was developed by James Clerk Maxwell. In 1820 Hans Christian Ørsted discovered that electric currents exerted forces on magnets, while in 1831, Michael Faraday made the observation that time - varying magnetic fields could induce electric currents. Until then, electricity and magnetism had been thought of as unrelated phenomena. In 1864, Maxwell published his famous paper on a dynamical theory of the electromagnetic field. This was the first example of a theory that was able to encompass previously separate field theories (namely electricity and magnetism) to provide a unifying theory of electromagnetism. By 1905, Albert Einstein had used the constancy of the speed of light in Maxwell's theory to unify our notions of space and time into an entity we now call spacetime and in 1915 he expanded this theory of special relativity to a description of gravity, General Relativity, using a field to describe the curving geometry of four - dimensional spacetime.

paragraph_text: The AP1000 is a nuclear power plant designed and sold by Westinghouse Electric Company. The plant is a pressurized water reactor with improved use of passive nuclear safety. The first AP1000 began operations in China at Sanmen Nuclear Power Station, where Unit 1 became the first AP1000 to achieve criticality in June 2018.

paragraph_text: The Ultima Tower is a hypothetical supertall skyscraper, designed by American architect Eugene Tsui in 1991. It has been envisioned to be built in San Francisco, California and could accommodate up to 1 million people. With a total height of , the tower would be 2 miles tall, and comprise 500 stories if built. It is one of the tallest buildings/man-made structures ever conceived.

paragraph_text: Park Chang-Gyu (born December 28, 1970) is a South Korean sprint canoer who competed in the early to mid-1990s. At the 1992 Summer Olympics in Barcelona, he was eliminated in the semifinals of both the C-1 500 m and the C-1 1000 m events. Four years later in Atlanta, Park was eliminated in the semifinals of both the C-2 500 m and the C-2 1000 m events.

paragraph_text: Being a private facility, it is situated inside the Meralco Center at Ortigas Avenue in Pasig City. The transformation of the JFCH into an integrated corporate wellness center made the Manila Electric Company the first corporation in the Philippines to institutionalize the implementation of such a program.

paragraph_text: HMS "Norfolk" was a County-class heavy cruiser of the Royal Navy; along with her sister ship she was part of a planned four-ship subclass. She served throughout the Second World War. She was also involved in the sinking of the German Navy's battleships and .

paragraph_text: Korea Hydro & Nuclear Power (, KHNP) is a subsidiary of the Korea Electric Power Corporation (KEPCO). It operates large nuclear and hydroelectric plants in South Korea, which are responsible for about 30% of the country's electric power supply. It was formally established in 2001 as part of a general restructuring at KEPCO, although KEPCO had opened its first nuclear plant at Kori in Busan in 1977. The first commercial operation of Kori nuclear #1 was held 1978.

paragraph_text: William Reichenstein (born 7 December 1947) is a British sprint canoer who competed from the mid-1970s to the early 1980s. At the 1976 Summer Olympics in Montreal, he was eliminated in the repechages of C-1 500 m event. Four years later in Moscow, Reichensten was eliminated in the semifinals in both the C-1 500 m and C-1 1000 m events.

paragraph_text: The first known electrically illuminated Christmas tree was the creation of Edward H. Johnson, an associate of inventor Thomas Edison. While he was vice president of the Edison Electric Light Company, a predecessor of today's Con Edison electric utility, he had Christmas tree light bulbs especially made for him. He proudly displayed his Christmas tree, which was hand - wired with 80 red, white and blue electric incandescent light bulbs the size of walnuts, on December 22, 1882 at his home on Fifth Avenue in New York City. Local newspapers ignored the story, seeing it as a publicity stunt. However, it was published by a Detroit newspaper reporter, and Johnson has become widely regarded as the Father of Electric Christmas Tree Lights. By 1900, businesses started stringing up Christmas lights behind their windows. Christmas lights were too expensive for the average person; as such, electric Christmas lights did not become the majority replacement for candles until 1930.

paragraph_text: Passenger elevators capacity is related to the available floor space. Generally passenger elevators are available in capacities from 500 to 2,700 kg (1,000–6,000 lb) in 230 kg (500 lb) increments.[citation needed] Generally passenger elevators in buildings of eight floors or fewer are hydraulic or electric, which can reach speeds up to 1 m/s (200 ft/min) hydraulic and up to 152 m/min (500 ft/min) electric. In buildings up to ten floors, electric and gearless elevators are likely to have speeds up to 3 m/s (500 ft/min), and above ten floors speeds range 3 to 10 m/s (500–2,000 ft/min).[citation needed]

paragraph_text: Hans Höfner (born 20 December 1912) was an Austrian cyclist. He competed in the individual and team road race events at the 1936 Summer Olympics.

paragraph_text: The Höfner 500/1 violin bass (nicknamed the "Beatle bass" or "Cavern bass") is a hollow-bodied bass guitar manufactured by Höfner under several varieties. It was introduced in the mid-1950s and gained celebrity status during the 1960s as one of the primary basses used by Paul McCartney of The Beatles.

paragraph_text: Xbox One S is available in 500 GB, 1 TB, and ``special edition ''2 TB models, which originally retailed at US $299, $349, and $399 respectively. The 2 TB model was released on August 2, 2016, and 1 TB and 500 GB models were released on August 23, 2016. and a Gears of War 4 special edition was also released. On June 11, 2017, Microsoft lowered the prices of the 500 GB Battlefield 1 and 1 TB Forza Horizon 3 Xbox One S console bundles by US $50. At Gamescom 2017, Microsoft unveiled a 1 TB Minecraft limited edition, with a grass block - themed hardware and a Creeper - themed controller.

paragraph_text: In the 1930s, musician and inventor Paul Tutmarc from Seattle, Washington, who was manufacturing lap steel guitars, developed the first electric string bass in its modern form, a fretted instrument designed to be played horizontally. The 1935 sales catalog for Tutmarc's electronic musical instrument company, Audiovox, featured his ``Model 736 Bass Fiddle '', a four - stringed, solid - bodied, fretted electric bass instrument with a 30 ⁄ - inch (775 - millimetre) scale length. The adoption of a guitar's body shape made the instrument easier to hold and transport than any of the existing stringed bass instruments. The addition of frets enabled bassists to play in tune more easily than on fretless acoustic or electric upright basses. Around 100 of these instruments were made during this period.

paragraph_text: The 2017 Daytona 500, the 59th running of the event, was held on February 26, 2017, and was won by Kurt Busch. This was Busch's 1st Daytona 500 win. Ryan Blaney finished 2nd, and A.J. Allmendinger finished 3rd. This race was contested for 200 laps on the 2.5 - mile (4.0 km) asphalt superspeedway. It was the first race of the 2017 Monster Energy NASCAR Cup Series season, and also marked the 1st race for Monster Energy as the new title sponsor for NASCAR's top series, replacing Sprint. Jeffrey Earnhardt made NASCAR history when he became the 1st ever 4th generation driver to compete in the Daytona 500.

Question: When was the first electric version of the instrument the Hofner 500/1 is a subclass of made?
Answer: the 1930s