Question: Where did John McCarthy officiate his first UFC match? 
Context: The year 2012 was the 20th year in the history of the Ultimate Fighting Championship (UFC), a mixed martial arts promotion based in the United States.  2012 started with UFC 142: Aldo vs. Mendes and ended with UFC 155: dos Santos vs. Velasquez 2.  The year saw the successful UFC Featherweight title defense by José Aldo, the crowning of Carlos Condit as the Interim Welterweight Champion, a new Lightweight Champion in Benson Henderson, a tournament to crown the first UFC Flyweight Champion as well as the finales of "The Ultimate Fighter 15" and "". The Ultimate Fighting Championship Part II (later renamed UFC 2: No Way Out) was a mixed martial arts (MMA) event held by the Ultimate Fighting Championship (UFC) on March 11, 1994, at Mammoth Gardens in Denver, Colorado.  The event was seen live on pay-per-view in the United States, and was later released on home video. UFC 30: Battle on the Boardwalk was a mixed martial arts event held by the Ultimate Fighting Championship at the Trump Taj Mahal in Atlantic City, New Jersey on February 23, 2001.  UFC 30 was the first UFC event under the new ownership of Zuffa, LLC, and also the first UFC event since UFC 22 to see a home video release. UFC 2009 Undisputed is a mixed martial arts video game featuring Ultimate Fighting Championship properties and fighters developed by Yuke's Osaka and published by THQ.  The game was released in the US on May 19, 2009, for the Xbox 360 and PlayStation 3.  It is the first game to be released under THQ's 2007 agreement with the UFC, and it is to be the first UFC game released since "" in 2004.  A playable demo of "UFC 2009" was released onto Xbox Live and PlayStation Network on April 23, 2009, and featured a tutorial and exhibition matchup between Chuck Liddell and Mauricio Rua.  A sequel, "UFC Undisputed 2010" was released on May 25, 2010. John Michael McCarthy (born October 12, 1962) is an American mixed martial arts referee, perhaps best known for his officiating of numerous bouts promoted by the Ultimate Fighting Championship (UFC) dating back to UFC 2.  Known to fans as "Big" John McCarthy, he took a brief sabbatical from officiating toward the end of 2007 to pursue a career in television commentary for The Fight Network and also provided commentary for Affliction, before returning to his role as a referee in 2008.  McCarthy is also a former Los Angeles Police Officer, and a Tactical Self-Defense Instructor at the Los Angeles Police Academy, as well as the founder of C.O.M.M.A.N.D: a training and certification school for MMA referees and judges.  He has also officiated bouts in Bellator, and is a qualified boxing referee.  In February 2015, Big John & Bellator commentator Sean Wheelock launched their new weekly podcast, Let's Get It On with Big John McCarthy & Sean Wheelock. Mark Daniel Coleman (born December 20, 1964) is a retired American mixed martial artist, professional wrestler, former NCAA collegiate wrestler and former Olympic amateur wrestler.  Known as The Hammer, he was the UFC 10 and UFC 11 tournament champion, the first UFC Heavyweight Champion, and the Pride Fighting Championships 2000 Open Weight Grand Prix champion.  At UFC 82 Coleman was inducted into the UFC Hall of Fame.  At the age of retirement he was taking 150,000 USD salary per year. Blind Flight is a 2003 British film directed by John Furse, starring Ian Hart and Linus Roache.  It is based on the true-life story of the kidnapping and imprisonment of the Irish academic Brian Keenan and the English journalist John McCarthy, two of the hostages in the Lebanon hostage crisis.  The film is based on Keenan's memoir, "An Evil Cradling" and "Some Other Rainbow" by John McCarthy who was a screenplay consultant.  The film received widespread critical acclaim, being nominated for six awards, and winning a BAFTA. William Edward John McCarthy, Baron McCarthy (30 July 1925 – 18 November 2012) was a British Labour politician.  McCarthy was a fellow of Nuffield College and Templeton College, Oxford and a specialist in industrial relations.  He was created a life peer in 1976.  From 1979 to 1997 he was Opposition Spokesperson for Employment.  McCarthy was described as "one of Britain’s most influential academics in the field of industrial relations, a painstaking arbiter in the most testing of disputes. . " Art Davie is a business executive and entrepreneur formerly active in Southern California advertising circles.  In 1993, he created and co-produced the tournament which became the televised Ultimate Fighting Championship.  In 1998, Davie, as vice-president of K-1 USA, brought the successful K-1 kickboxing franchise from Japan to Las Vegas and North American pay-per-view television.  In 2003, Davie was an executive producer with Mandalay Sports Entertainment.  In 2006, he became vice-president of television at Paradigm Entertainment Group.  In 2014, Ascend Books published Davie's book, "Is This Legal? : The Inside Story of the First UFC from the Man Who Created It".  Sean Wheelock assisted in the book's research and writing.  In November 2014, Davie was inducted into the Legends of MMA Hall of Fame, alongside Big John McCarthy, Pat Miletich, Fedor Emelianenko, and Rickson Gracie. John P. McCarthy (March 17, 1884 – September 4, 1962), also known as J.P. McCarthy or simply as John McCarthy, was an American director and screenwriter of the 1920s through 1945.  He began in the film industry in front of the camera, as an actor in silent films and film shorts during the 1910s, before moving behind the camera in 1920.  He would usually direct his own screenplays.  Although he directed the occasional drama or comedy, his specialty was the Western, which make up most of his filmography.
Answer: Denver, Colorado