Question: What began as a result of the size of the domestic market and the use of mass-production, that use's a radio station in metro Detroit as the primary provider of news involving it?

full_context: Document 1: Automotive industry in Japan: The Japanese automotive industry is one of the most prominent and largest industries in the world. Japan has been in the top three of the countries with most cars manufactured since the 1960s, surpassing Germany. The automotive industry in Japan rapidly increased from the 1970s to the 1990s (when it was oriented both for domestic use and worldwide export) and in the 1980s and 1990s, overtook the U.S. as the production leader with up to 13 million cars per year manufactured and significant exports. After massive ramp-up by China in the 2000s and fluctuating U.S. output, Japan is now currently the third largest automotive producer in the world with an annual production of 9.9 million automobiles in 2012. Japanese investments helped grow the auto industry in many countries throughout the last few decades.
Document 2: WDET-FM: WDET-FM is a public radio station in Detroit, Michigan. Licensed to Wayne State University in the city's Cass Corridor neighborhood, about a mile south of the New Center neighborhood, WDET broadcasts original programming and shows from National Public Radio, Public Radio International and American Public Media. It broadcasts on the FM dial at 101.9 MHz. The station serves Metro Detroit and is the primary provider of news involving the American automotive industry and Michigan politics within the NPR distribution network.
Document 3: WXYT-FM: WXYT-FM (97.1 MHz) — branded 97-1 The Ticket — is a commercial FM radio station licensed to Detroit and serving the Metro Detroit, Michigan media market. WXYT-FM is owned by CBS Radio and broadcasts a sports radio format. Most programming is local with CBS Sports Radio supplying overnight and some weekend shows. (Sister station WXYT 1270 AM carries the CBS Sports Radio Network around the clock.)
Document 4: Wayne State University: Wayne State University (WSU) is a public research university located in Detroit, Michigan. Founded in 1868, WSU consists of 13 schools and colleges offering nearly 350 programs to more than 27,000 graduate and undergraduate students. Wayne State University is Michigan's third-largest university and one of the 100 largest universities in the United States.
Document 5: Electronics industry in Japan: The Japanese electronics industry is the largest consumer electronics industry in the world, though the share of these Japanese companies gradually declined by competition from South Korea, Taiwan and China. Japan still has a number of companies that produce television, camcorders, audio and video players, etc.
Document 6: American Yarn: American Yarn, formerly Burlington Industries, is an American company. It is the second largest warp drawn textile manufacturer, in the United States and is the third largest in the world. Founded initially as a part of Burlington Industries (International Textile Group), AY Manufacturing Services is a privately held company operating out of the Pioneer Plant - birthplace of Burlington Industries - in Burlington, North Carolina and is one of the area's main employers. The company records over 100 million USD in sales and has over 300 employees. AY Manufacturing Services is the main textile supplier for the Ford Motor Company and one of the largest textile suppliers for BMW and General Motors (GM).
Document 7: WDFN: WDFN is a sports-talk radio station in the Detroit, Michigan, market. It broadcasts in the AM radio band at 1130 kHz, which is a clear-channel frequency. WDFN is not considered a clear-channel station because of its Class B status. WDFN is owned by iHeartMedia, and until the end of the 2008-09 NBA season, was the flagship station for the Detroit Pistons. It is affiliated with Fox Sports, as well as MRN and PRN for NASCAR coverage. WDFN is one of several sports-talk stations in metro Detroit, the others being WXYT-AM (CBS Sports), WCAR (SB Nation Radio), and WXYT-FM ("The Ticket"). WDFN is the only one of the four sports stations that carries a significant amount of community programming and infomercials unrelated to sports.
Document 8: AutoNation: Founded by H. Wayne Huizenga in 1996, AutoNation has become the largest automotive retailer in the United States and is the leading provider of new and pre-owned vehicles and associated services in the US. The company currently owns and operates over 360 retail operations throughout the continental US and is currently led from its Ft Lauderdale, Florida headquarters by the Chairman, Chief Executive Officer Mike Jackson, former President of Mercedes-Benz North America.
Document 9: KEC63: KEC63 (sometimes referred to as Detroit All Hazards) is a NOAA Weather Radio station that serves the Metro Detroit area and surrounding cities. It is programmed from the National Weather Service forecast office in Detroit/Pontiac, Michigan with its transmitter located in Southfield, on WDIV's broadcast tower. It broadcasts weather and hazard information for the following Counties: Lenawee, Livingston, Monroe, Oakland, St. Clair, Washtenaw, and Wayne. Under exceptionally rare conditions, such as when KEC63 is down for maintenance or off the air from lighting strikes to its tower, Cleveland, Ohio's weather radio station, KHB59 can be faintly heard, since it also operates on 162.550 MHz.
Document 10: WRIF: WRIF (101.1 FM) — branded 101 WRIF: The RIFF — is a commercial active rock radio station licensed by the Federal Communications Commission (FCC) to operate in Detroit, Michigan serving surrounding Metro Detroit. The station is currently owned by Beasley Media Group. WRIF is a grandfathered "Superpower" Class B station with a signal equivalent to 92,000 watts at 500 ft; stated another way, under current U.S. Federal Communications Commission (FCC) limits for Class B stations, WRIF would be allowed to broadcast an effective radiated power (ERP) of no more than 16,000 watts using an antenna of height of 268 meters. As such, the signal can be heard as far as Lexington, MI; Jackson; Chatham-Kent and Lambton County, Ontario; North Baltimore, Ohio; and occasionally as far south as Delaware, Ohio. The station transmitter is located in the Detroit suburb of Southfield near the intersection of 10 Mile Road and Northwestern Highway, and transmits its signal from the same tower as WXYZ-TV. WRIF's studios are in Ferndale.
Document 11: Wayne State University Law School: Wayne State University Law School is located in Midtown, the City of Detroit’s Cultural Center, and is one of the schools of Wayne State University. It is one of two public law schools in the state of Michigan and has educated and trained lawyers since 1927. Wayne Law's more than 11,000 alumni include judges, justices, law firm partners and government officials working in all 50 states and at least 12 foreign countries.
Document 12: General Motors: General Motors Company, commonly known as GM, is an American multinational corporation headquartered in Detroit, Michigan, that designs, manufactures, markets, and distributes vehicles and vehicle parts, and sells financial services. With global headquarters at the Renaissance Center in Detroit, Michigan, United States, GM manufactures cars and trucks in 35 countries. In 2008, 8.35 million GM cars and trucks were sold globally under various brands. GM reached the milestone of selling 10 million vehicles in 2016. Current auto brands are Buick, Cadillac, Chevrolet, GMC, Holden, and Wuling. Former GM automotive brands include McLaughlin, Oakland, Oldsmobile, Pontiac, Hummer, Saab, Saturn, as well as Vauxhall, and Opel, which were bought by Groupe PSA in 2017.
Document 13: Construction industry of Japan: In Japan, the mainstay of infrastructure development is the construction industry, which employed 9.4 percent of the labor force in 1990 and contributed some 8.5 percent of GDP. After the two oil crises (1973 and 1979) in the 1970s, construction investment turned sluggish, and the share of construction investment in GNP decreased gradually. In 1987, however, business expanded through investor confidence, continued increase in corporate earnings, improvement of personal income, and rapid rise in land prices. The share of construction investment in GNP rose sharply, especially for more sophisticated and higher value-added private housing and private non-housing structures (see table 19, Appendix). After employment peaking at 9.9% in 2003, the construction industry in Japan has entered a long, steady decline with workers share dropping to 7.0% by 2017. This decline is attributed to gradually slumping demand for the new houses. Japanese construction worker productivity have surpassed US productivity in 2006, but as in 2017, productivity of 0.24 houses/worker*year is still below peak value of 0.32 houses/worker*year in 1992. This downward trend (although less pronounced than in the US) is mostly attributed to the increasing median age of the construction workers. The productivity on concrete-making industry remains on the level along with the most productive countries, with the 1.29 man-hours per cubic meter reported in 2011 (with the leading US having 1.00 man-hours per cubic meter).
Document 14: Automotive industry in the United States: The automotive industry in the United States began in the 1890s and, as a result of the size of the domestic market and the use of mass-production, rapidly evolved into the largest in the world. However, the United States was overtaken as the largest automobile producer by Japan in the 1980s, and subsequently by China in 2008. The U.S. is currently second among the largest manufacturer in the world by volume, with approximately 8-10 million manufactured annually. Notable exceptions were 5.7 million automobiles manufactured in 2009 (due to crisis), and peak production levels of 13-15 million units during the 1970s and early 2000s.
Document 15: Automotive industry in North Korea: The automotive industry in North Korea is a branch of the national economy, with much-lower production than that in South Korea. North Korean motor vehicle production is geared towards the Korean People's Army, industrial and construction goals; there is little car ownership by private citizens. In addition to cars and trucks, North Korea produces buses, trolleybuses and trams.
ground_truth: automotive industry in the United States