Question: WCW Nitro Grill, located in Excalibur Hotel and Casino, was owned and operated by who?

Context paragraphs:
Rick Fuller: Richard "Rick" Fuller is an American professional wrestler.  He is best known for his appearances World Championship Wrestling.  He would later be featured in several video games including "WCW Nitro" and "WCW/nWo Thunder".

Mandalay Bay Tram: The Mandalay Bay Tram is a 838 m long people mover that opened on April 9, 1999 on the Las Vegas Strip in Paradise, Nevada.  It was constructed to connect three gaming hotels belonging to the MGM Mirage Group.  The line carries passengers from the major Tropicana – Las Vegas Boulevard intersection, via the Excalibur Hotel and Casino and Luxor Hotel to the Mandalay Bay Resort and Casino at the southern end.

Veldon Simpson: Veldon Simpson is an architect.  He designed the Luxor Hotel in Las Vegas, Nevada, as well as the MGM Grand and Excalibur Hotel and Casino.  He is the president of the Veldon Simpson-Architect, Inc., which formed as a corporation in 1976.

WCW/nWo Thunder: WCW/nWo Thunder is a video game based on the professional wrestling TV show "WCW Thunder" and released on the PlayStation console by THQ in 1998.  "Thunder" is the sequel to "WCW Nitro" and updates the previous game with new characters and features, including cage matches, battle royals, weapon use, and the ability to select what stable each wrestler competed for (this included WCW, nWo Hollywood, nWo Wolfpac, Raven's Flock, and The Four Horsemen).  However, "Thunder" received poor reviews.  Many of these were due to its graphics, style, and overall atmosphere, which bore too many similarities to "WCW Nitro" (e.g. all the cheat codes were exactly the same).  A modification was also made to the control scheme, which allowed players to wear down and easily beat the opponent simply by winning grapples repeatedly, hitting your opponent once and then pinning them in around 30 seconds.  This contributed to the harsh reviews the game received.

William Pennington (businessman): William Norman Pennington (March 24, 1923 – May 15, 2011) was an American casino industry executive.  A pioneer in Nevada’s casino industry, he played a major role in establishing the Circus Circus company, including Excalibur Hotel Casino, Luxor and Mandalay Bay.  He owned several properties in Las Vegas, Reno, Hawaii and elsewhere.  For many years he was listed on the Forbes 400.

Corey I. Sanders: 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.

WCW Nitro (video game): WCW Nitro is a video game based on the professional wrestling TV show "WCW Monday Nitro".  Released by THQ for the PlayStation game console in 1998, the game featured a large roster of playable WCW wrestlers as well as full motion video clips of the TV show.  The game was followed by "WCW/nWo Thunder", which was based on "Nitro's" Thursday night counterpart.  Ports for the PC and Nintendo 64 were released in 1999 with the updated roster featured in "Thunder".

Tropicana – Las Vegas Boulevard intersection: 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.

Excalibur Hotel and Casino: Excalibur Hotel and Casino is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada, in the United States.  It is owned and operated by MGM Resorts International.

WCW Nitro Grill: WCW Nitro Grill was an American professional wrestling themed steak house that opened in May 1999 at the Excalibur Hotel and Casino.  Professional wrestlers frequented the restaurant when they were touring in Las Vegas.  It closed in September 2000.

Supporting paragraphs: WCW Nitro Grill Excalibur Hotel and Casino
Answer: MGM Resorts International