Question: Who owned and operated the MGM Grand Hotel that was the site of the worst disaster in the history of Nevada?
Context: 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. Floyd Mayweather Jr. vs. Robert Guerrero, billed as May Day, was a boxing welterweight championship superfight for Mayweather's World Boxing Council (WBC) Welterweight title and vacant "Ring" Welterweight title.  The bout was held on May 4, 2013, in the MGM Grand Garden Arena at the MGM Grand Hotel & Casino in Las Vegas, Nevada, United States on Showtime PPV.  The bout was the first major televised fight of Mayweather's career to not be aired on HBO PPV.  The card featured some of the rising stars of Mayweather Promotions: J'Leon Love, Badou Jack, Luis Arias, Ronald Gavril and Lanell Bellows.  Mayweather won via unanimous decision with Guerrero winning the first 3 rounds, then Mayweather adjusted and won from the 4th to 12th round. Floyd Mayweather Jr. vs. Canelo Álvarez, billed as "The One", was a boxing light middleweight championship superfight.  The bout was held on September 14, 2013, in the MGM Grand Garden Arena, at the MGM Grand Hotel & Casino in Las Vegas, Nevada, United States, on Showtime PPV.  Mayweather received $41.5 million for this fight before taking into account pay-per-view sales. The MGM Grand Las Vegas (formerly Marina and MGM-Marina) is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada.  The MGM Grand is the largest single hotel in the United States with 5,124 rooms.  It is also the third-largest hotel complex in the world by number of rooms and second-largest hotel resort complex in the United States behind the combined The Venetian and The Palazzo.  When it opened in 1993, the MGM Grand was the largest hotel complex in the world. The Stockport air disaster occurred on 4 June 1967, when a Canadair C-4 Argonaut passenger aircraft owned by British Midland Airways crashed in a small open area at Hopes Carr, near the centre of Stockport, Cheshire, England.  Of the 84 people on board, 72 were killed, while all 12 survivors were seriously injured.  The accident stands as the fourth worst disaster in British aviation history, and the second worst disaster to date to happen on English soil. Floyd Mayweather Jr. vs. Marcos Maidana, billed as "The Moment", was a boxing welterweight championship fight.  The bout was held on May 3, 2014, in the MGM Grand Garden Arena, at the MGM Grand Hotel & Casino in Las Vegas, Nevada, United States, on Showtime PPV. Bally's Las Vegas (formerly MGM Grand Hotel and Casino) is a hotel and casino on the Las Vegas Strip in Paradise, Nevada.  It is owned and operated by Caesars Entertainment Corporation.  The hotel features 2,814 extra-sized guestrooms that are 450 sqft or larger and over 175000 sqft of banquet and meeting space.  The casino occupies 66187 sqft .  About 75% of the rooms are in the Indigo Tower, and were renovated in 2004.  The remaining rooms are located in the Jubilee Tower, constructed in 1981. MGM Grand Adventures Theme Park was a theme park adjacent to the MGM Grand hotel and casino in Paradise, Nevada, United States.  It operated from 1993 to 2002. The MGM Grand fire occurred on November 21, 1980 at the MGM Grand Hotel and Casino (now Bally's Las Vegas) in Paradise, Nevada, USA.  The fire killed 85 people, most through smoke inhalation.  The tragedy remains the worst disaster in Nevada history, and the third-worst hotel fire in modern U.S. history, after the 1946 Winecoff Hotel fire in Atlanta that killed 119 people and the Dupont Plaza Hotel, San Juan, Puerto Rico fire on December 31, 1986, in which 97 perished. Corey Sanders has served as Chief Operating Officer of MGM Resorts International since June 2010.  He oversees operations at the Company’s wholly owned properties, which in Nevada include Bellagio (resort), MGM Grand Las Vegas, Mandalay Bay, The Mirage, New York-New York Hotel and Casino, Monte Carlo Resort and Casino, Luxor Las Vegas, Excalibur Hotel and Casino, Circus Circus Las Vegas, Circus Circus Reno, Gold Strike Jean and Railroad Pass Casino.  He also oversees Beau Rivage (Mississippi) in Biloxi and Gold Strike Tunica, both in Mississippi, as well as MGM Grand Detroit.
Answer: Caesars Entertainment Corporation