Question: Who owns and operates the casino at which the 2010 World Series of Poker was held?
Context: Matt Keikoan is an American professional poker player who has won two World Series of Poker bracelets; his first was in the 2008 World Series of Poker $2,000 No-Limit Hold'em event and his second was in the 2010 World Series of Poker $10,000 Limit Hold'em Championship.  His 2010 WSOP bracelet is currently listed for sale on eBay due to big losses against Tom "durrr" Dwan in Ivey's Room at the Aria Hotel and Casino.  There have been no offers made. The 2010 World Series of Poker was the 41st annual World Series of Poker (WSOP), held at the Rio All Suite Hotel and Casino in Paradise, Nevada, and ran from May 28 to July 17.  There were 57 bracelet events, culminating in the $10,000 No Limit Hold'em Championship that began on July 5.  The November Nine concept returned for the third year, with the Main Event finalists returning on November 6. Michael David Mizrachi (born January 5, 1981) is an American professional poker player who won the 2010 and 2012 World Series of Poker $50,000 Players Championship.  Mizrachi also has two World Poker Tour titles, and he finished 5th in the Main Event of the 2010 World Series of Poker.  In January 2013, Mizrachi signed on as a team pro with Lock Poker. David Warga poker dealer who won a bracelet in the 2002 Casino Employees Championship event at the World Series of Poker and then at the 2010 World Series of Poker won his second bracelet in an open event in the $1,500 Seven Card Stud Hi-Low-8 or Better. José-Luis Velador (born in Jalisco, Mexico) is a Mexican-American professional poker player from Corona, California, who is a two-time World Series of Poker bracelet winner.  He won his first bracelet at the 2008 World Series of Poker in the $1,500 No-Limit Hold'em event and then two years later at the 2010 World Series of Poker he won his second bracelet after defeating David Chiu heads-up in the $2,500 Pot Limit Hold'em/Omaha event. Matthew "Matt" Jarvis is a Canadian professional poker player from Surrey, British Columbia, known for his November Nine appearance in the 2010 World Series of Poker Main Event.  He earned his first World Series of Poker bracelet at the 2011 World Series of Poker. Konstantin Puchkov (born 1952) is a Russian poker player, horse trainer and horse breeder from Moscow.  He was the fourth Russian-born player to earn a World Series of Poker bracelet.  He is best known for having earned a World Series of Poker bracelet in his first World Series of Poker in the money finish (2010 World Series of Poker Event #31: H.O.R.S.E., $1,500 buy-in) and setting the record for most in the money finishes at one series during the 2012 World Series of Poker (11). Rio Las Vegas is a hotel and casino near the Las Vegas Strip in Paradise, Nevada, United States.  It is owned and operated by Caesars Entertainment Corporation.  The Rio was the first all suite resort in the Las Vegas area.  It was named after the city of Rio de Janeiro and is influenced by Brazilian culture.  It is the host casino for the World Series of Poker. John Racener (born December 17, 1985) is an American poker professional from Port Richey, Florida, best known as the runner-up of the Main Event at the 2010 World Series of Poker.  He has made World Series of Poker final tables on 14 occasions, as well as one World Poker Tour final table. James Dempsey, known online as Flushy, is an English professional poker player from Brighton, England, who won a World Series of Poker bracelet at the 2010 World Series of Poker in the event and a World Poker Tour title at the 2011 Doyle Brunson World Poker Classic.
Answer: Caesars Entertainment Corporation