Question: what group performs shows at the Treasure Island Hotel and Casino and the MGM Grand in Las Vegas, Nevada?
Context: 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. Stephen Alan Wynn ("né" Weinberg; born January 27, 1942) is an American real estate businessman and art collector.  He is known for his involvement in the American luxury casino and hotel industry.  Early in his career he oversaw the construction and operation of several notable Las Vegas and Atlantic City hotels, including the Golden Nugget, the Golden Nugget Atlantic City, The Mirage, Treasure Island, the Bellagio, and Beau Rivage in Mississippi, and he played a pivotal role in the resurgence and expansion of the Las Vegas Strip in the 1990s.  In 2000, Wynn sold his company Mirage Resorts to MGM Grand Inc., resulting in the formation of MGM Mirage (now MGM Resorts International).  Wynn afterwards took his company Wynn Resorts public in an initial public offering, and he remains Wynn Resorts' CEO and Chairman of the Board.  He is a member of the Republican Party.  Wynn is the finance chair of the Republican National Committee (RNC) since 2017. Mystère is a Cirque du Soleil show in permanent residence at the Treasure Island Hotel and Casino in Las Vegas, Nevada, United States.  It is one of six resident Cirque du Soleil shows in Las Vegas, the others being "O", "Zumanity", "Kà", "Love", and "".  "Mystère" was first performed on December 25, 1993 and quickly won over audiences with its unique style of circus entertainment.  As with many Cirque du Soleil productions, "Mystère" features a mixture of circus skills, dance, elaborate sets, opera, worldbeat music, and street theatre-style comedy. Treasure Island Resort & Casino began as a bingo hall in 1984 called Island Bingo.  This building started as a 30,000-square-foot space that seated 1,400 people.  Through its time of success it began to grow further into Treasure Island after Congress passed the Indian Gaming Regulatory Act of 1988.  This act required states to negotiate gaming compacts with the Tribe as a way to strengthen tribal governments and improve the quality of life on reservations.  This act contributed to much tribal success for Prairie Island Indian Community in addition to the entire state of Minnesota.  Shortly after this in 1989, Prairie Island Indian Community signed a compact with the State of Minnesota which allowed it to expand its gaming operation.  In 1991, the 30,000-square-foot building was expanded with a 25,000-square-foot addition that created room for additional games.  Not long after this in 1992, the casino was expanded by an additional 25,000 square feet.  Growth in the Prairie Island Indian Community was shown through this with the opening of a community center, health care facility as well as improvement to tribal water and sewer systems.  In 1993, a 78,000-square-foot expansion was added which created three new restaurants, valet parking, state-of-the-art kitchen, a gift shop, players club, ballroom and a new entertainment area.  In the following year, a 137-slip marina and 95-site RV park would open.  Growth continued as 9,854-square-foot addition for business offices is established in 1995.  In 1996, Treasure Island made a big step with a $20 million addition and redesign.  A strategic marketing shift changed the name to Treasure Island Resort & Casino with the addition of new theming and a 250-room hotel transformed Treasure Island into a destination resort.  The total square footage has 350,000 with 25,000 square feet designed for meeting space.  In 2001, an additional 200,000 feet were added to the casino, which included a new great entry, higher ceilings to improve air quality, additional games, 70,000-square-foot office space and 60,000-square-foot warehouse.  An expansion that was completed in fall 2008 included 230 new hotel rooms, 30,000-square-foot event center and a bowling center complete with an arcade area.  In 2015, Tado Steakhouse was constructed, Tradewinds Buffet was remodeled and the water park & spa construction began.  The Lagoon and Wave Spa opened February 9, 2016. Kà is a show by Cirque du Soleil at the MGM Grand in Las Vegas, Nevada.  "Kà" describes the story as "the coming of age of a young man and a young woman through their encounters with love, conflict and the duality of "Kà", the fire that can unite or separate, destroy or illuminate." Treasure Island Hotel & Casino (also known as "TI") is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada, USA with 2,664 rooms and 220 suites, and is connected by tram to The Mirage as well as pedestrian bridge to the Fashion Show Mall shopping center.  Since March 2009, TI is owned and operated by Phil Ruffin. 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. Mark E. Brown is an American businessman and former CEO of Zen Entertainment and a former vice president of The Howard Hughes Corporation.  His company currently has partnership deals with ESPN Radio, Fox Sports Radio, NBCSports.com, Ultimate Fighting Championship, World Wrestling Entertainment, and casinos such as the Treasure Island Hotel and Casino, Hard Rock Hotel.  He is also the former Partner and President of R&R Partners, the ad agency which created the "What Happens in Vegas, Stays in Vegas" advertising campaign for the Las Vegas Convention and Visitors Authority.  In addition, Brown is founder and director of Service 1st Bank of Nevada, valued in 2010 around $210 million, and previously served as the President of MBC Communications. The Tropicana – Las Vegas Boulevard intersection on the Las Vegas Strip (Tropicana Avenue and Las Vegas Boulevard), is noteworthy for several reasons.  It was the first intersection in Las Vegas completely closed to street level pedestrian traffic and its four corners are home to four major resorts: Excalibur Hotel and Casino, Tropicana Las Vegas, New York-New York Hotel and Casino and MGM Grand Las Vegas—the latter has 5,044 rooms and was once the largest hotel in the world.  The resorts at the four corners have a total of 12,536 hotel rooms as of 2016. 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.
Answer: Cirque du Soleil