Question:  Argent Corporation was a company in Las Vegas that at one time controlled a hotel that operated when?

full_context: Document 1: Kirk Kerkorian: Kerkor "Kirk" Kerkorian (June 6, 1917 – June 15, 2015) was an Armenian-American businessman, investor, and philanthropist. He was the president and CEO of Tracinda Corporation, his private holding company based in Beverly Hills, California. Kerkorian is known for having been one of the important figures in the shaping of Las Vegas and, with architect Martin Stern, Jr. described as the "father of the mega-resort". He built the world's largest hotel in Las Vegas three times: the International Hotel (opened in 1969), the MGM Grand Hotel (1973) and the MGM Grand (1993). He purchased the Metro-Goldwyn-Mayer movie studio in 1969.
Document 2: Riviera (hotel and casino): Riviera (colloquially, "the Riv") was a hotel and casino on the Las Vegas Strip in Winchester, Nevada, which operated from April 1955 to May 2015. It was last owned by the Las Vegas Convention and Visitors Authority, which decided to demolish it to make way for the Las Vegas Global Business District.
Document 3: Vegas Vic: Vegas Vic is a Las Vegas, Nevada neon sign that resembles a cowboy that was erected on the exterior of The Pioneer Club in Las Vegas in 1951. The sign was a departure in graphic design from typeface based neon signs, to a friendly and welcoming human form of a cowboy. The sign's human-like abilities of talking and waving its arm constituted an immediate acceptance as the unofficial welcoming sign reproduced thousands of times over the years and all over the world. The trademark is currently owned by Pioneer Hotel, Inc. which owns and operates the Pioneer Hotel and Gambling Hall in Laughlin, Nevada. The sign can still be found at 25 E Fremont Street, where he has been since 1951 on the exterior of what used to be The Pioneer Club but is currently a souvenir shop. Pioneer Hotel, Inc. is the owner of the Pioneer Hotel and Gambling Hall along the Colorado River in Laughlin, Nevada that has a twin of the Vegas Vic image on another large sign referred to as River Rick.
Document 4: New Frontier Hotel and Casino: The New Frontier (formerly Last Frontier and The Frontier) was a hotel and casino on the Las Vegas Strip in Paradise, Nevada, US. It was the second resort that opened on the Las Vegas Strip and operated continuously from October 30, 1942 until it closed on July 16, 2007. The building was demolished on November 13, 2007. The land is now owned by Crown Resorts who abandoned their project to build the Alon Las Vegas in May 2017 and put it up for sale.
Document 5: MGM Resorts International: MGM Resorts International is a global hospitality and entertainment company operating destination resorts in Las Vegas, Mississippi, New Jersey and Detroit, including Bellagio, MGM Grand, Mandalay Bay and The Mirage. The company recently opened MGM National Harbor in Maryland and is developing MGM Springfield in Massachusetts. It has a majority interest in MGM China Holdings Limited, which owns the MGM Macau resort and casino and is developing a gaming resort in Cotai. MGM Resorts owns 50 percent of CityCenter in Las Vegas, which features ARIA Resort & Casino. It has a majority controlling interest in MGM Growth Properties, a real estate investment trust.
Document 6: Hacienda Arms Apartments: Hacienda Arms Apartments, also known as Coronet Apartments and Piazza del Sol, is a historic building located on the Sunset Strip in West Hollywood, California. The four-story, 52000 sqft Italian Renaissance Revival sourced Mediterranean Revival style structure was built in 1927 and operated initially as a luxury apartment building catering to the entertainment business. In the 1930s, it became the "most famous brothel in California." The building declined in prestige in the 1950s and 1960 and was acquired by rock star Rod Stewart in the 1970s. After Stewart's plans to redevelop the building as a luxury hotel ended in a legal dispute, the building was nearly destroyed in a 1983 fire that was found to be of suspicious origin. Since 1986, it has been known as the Piazza del Sol, and it now houses the offices of several production companies, including Miramax Films. The restaurant Katana, co-owned by Ryan Seacrest and Tori Spelling and described by "Newsweek" as "so hip it hurts," also operates at the building.
Document 7: Flamingo Las Vegas: Flamingo Las Vegas (formerly The Fabulous Flamingo and Flamingo Hilton Las Vegas) is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada. It is owned and operated by Caesars Entertainment Corporation.
Document 8: Tracinda: Tracinda Corporation is an American private investment corporation that was owned by the late Kirk Kerkorian. Its major investments include a minority interest of MGM Resorts International. Tracinda is headquartered in Las Vegas, Nevada. The company was named after Kerkorian's daughters, Tracy and Linda.
Document 9: Hacienda (resort): The Hacienda Resort Hotel and Casino was a hotel and casino on the Las Vegas Strip in Paradise, Nevada, that operated from 1956 to 1996. It was one of a chain of four Hacienda properties, with the other three being located in Fresno, Bakersfield, and Indio, California. Each Hacienda featured a distinctive horse and rider sign; the Las Vegas sign is now prominently displayed at the Neon Museum.
Document 10: Wild Horse Adult Resort &amp; Spa: The Wild Horse Adult Resort and Spa was an adult entertainment complex about 14 mi east of Reno, Nevada, USA that is home to two separate legal, licensed brothels: the Wild Horse Ranch and the Mustang Ranch. The property is located in a secluded portion of the Patrick Business Park, in the far northern portion of Storey County, at 1000 Wild Horse Canyon Drive, Sparks, NV 89434. Primary access to the area is via exit 28 off Interstate 80. The nearby settlement of Patrick, from which the Business Park takes its name (and occupants their mailing addresses), is actually found across the Truckee River and thus is located in Washoe County.
Document 11: South Point Hotel, Casino &amp; Spa: The South Point Hotel and Casino consists of a 25-story hotel tower and 90000 sqft convention center located on a 60 acre site along Las Vegas Boulevard in Enterprise, Nevada and adjacent to Silverado Ranch. The casino is owned and operated by Michael Gaughan and it serves as the primary sponsor of Gaughan's son Brendan Gaughan's race car.
Document 12: American Casino &amp; Entertainment Properties: American Casino & Entertainment Properties (ACEP) is a casino holding company headquartered at the Stratosphere Las Vegas. ACEP was a wholly owned subsidiary of American Real Estate Partners before it was sold to Whitehall Street Real Estate Funds, an investment arm of Goldman Sachs, in February 2008. The company owns the following 4 casinos: Aquarius Casino Resort, Arizona Charlie's Decatur, Arizona Charlie's Boulder, and Stratosphere Las Vegas.
Document 13: Harrah's Resort Southern California: Harrah's Resort Southern California (formerly Harrah's Rincon) is an Indian casino and hotel in Funner, California. It is owned by the Rincon Band of Luiseño Indians and operated by Caesars Entertainment Corporation.
Document 14: Argent Corporation: Argent Corporation was a company in Las Vegas that at one time controlled the Hacienda Hotel/Casino, the Stardust Resort & Casino, the Fremont Hotel and Casino and the casino in the Marina Hotel. The company was owned by Allen Glick, a San Diego real estate investor. The name Argent came from the three initials of his name, combined with the first three letters of the word "Enterprises". However, state and local officials in Nevada believed that the casinos were controlled by organized crime families in the Mid-West and that a huge skimming operation was conducted within the casinos.
Document 15: Station Casinos: Station Casinos is a gaming company based in the Las Vegas suburb of Summerlin, Nevada, founded by Frank Fertitta, Jr. Station Casinos, along with Affinity Gaming, Boyd Gaming, and American Casino & Entertainment Properties, dominate the locals casino market in Las Vegas. The company purchased several sites that were gaming-entitled, meaning that major casinos can be built at that location without additional approvals. There are only a limited number of such sites available in the Las Vegas area. Station has also branched out into managing casinos that they do not own. Red Rock Resorts, Inc. () is a publicly traded holding company that owns a portion of Station Casinos.
ground_truth: from 1956 to 1996