Question: Saint-Isidore, Montérégie, Quebec is the hometown of a mixed martial arts champion who retired what year ?
Context: Bridgett Riley (born May 13, 1973) is a female boxer and motion picture stuntwoman from Oakville, Missouri.  While working as an airline attendant, she decided to learn martial arts.  The interest in the sport came from her brother Patrick's strong interest in mixed martial arts.  She trained with her brother and a number of other high-profile martial artists early in her career.  Notably, she was trained by former three time world kickboxing champion, Jim Boucher (Belleville, IL).  She was a member of a competition team with other competitors such as: Ronnie "Diamond" Deleon (World Kickboxing Champion), Patrick Riley (mixed martial arts champion), Donny Reinhardt (world champion), Russ Hogue (US Kickboxing Champion). Georges St-Pierre (] ; born May 19, 1981), often referred to as GSP, is a Canadian mixed martial artist (MMA) and a three-time former Welterweight Champion of the Ultimate Fighting Championship (UFC), having won the title twice in 2006 and 2008, as well as an Interim title in 2007.  Frequently cited as one of the greatest MMA fighters of all time, St-Pierre was ranked as the #1 welterweight in the world for several years by Sherdog and numerous other publications.  In 2008, 2009, and 2010 he was named the Canadian Athlete of the Year by Rogers Sportsnet.  Fight Matrix lists him as the top MMA Welterweight of all time and most accomplished fighter in MMA history.  He retired on December 13, 2013, holding the record for most wins in title bouts and the second longest combined title streak in UFC history (2,204 days). Saint-Isidore is a parish municipality in Roussillon Regional County Municipality in the Montérégie administrative region of Quebec, Canada.  The population as of the Canada 2011 Census was 2,581.  It is the hometown of mixed martial arts champion Georges St-Pierre. Jan Lucanus is an American comic book writer, filmmaker, martial artist, musical artist, and entrepreneur.  He is the founder and CEO of the transmedia company Creative Impulse Entertainment, Inc., co-creator/co-writer of the mixed martial arts comic books series, , is an award-winning filmmaker, an international martial arts champion in both the full contact sport of San Shou and the sport of Tai Chi Push Hands, and is a rapper/singer/songwriter.  Lucanus also consults on business, production, and creative strategies for companies and individuals across comics, film, television, music, and games.  He is a graduate of the New York University Maurice Kanbar Institute for Film & Television, Tisch School of the Arts, holding a degree in Film Production. Bertrand Amoussou-Guenou (born May 29, 1966) is a retired French mixed martial artist and judoka.  He is a trainer for his younger brother Karl of "Team Amoussou" and, following official recognition of mixed martial arts in France, became the president of the national sanctioning body, the Commission National de Mixed Martial Arts, in January 2008.  On 1 October 2013, Amoussou assumed the position of president of the International Mixed Martial Arts Federation (IMMAF). Maurice L. Smith (born December 13, 1961) is a retired American kickboxer, mixed martial artist, and a member of the UFC Hall of Fame.  He held the world light heavyweight and heavyweight championships from the World Kickboxing Association, World Kickboxing Council, International Sport Kickboxing Association and other promotions, as well as mixed martial arts champion for Battlecade Extreme Combat 3 and 4 champion as well as Ultimate Fighting Championship 13 and 14 champion.  A professional competitor since 1980, Smith has formerly competed in kickboxing for the companies All Japan Enterprise and K-1, Pancrase, RINGS, PRIDE, Strikeforce, International Fight League and RFA. Philip Sahagun is a martial arts champion in both forms and fighting.  With a background in American Kenpo, Kickboxing, Wushu and Shaolin Kung Fu, Philip is a 7-time National Weapons Champion and a 3-Time International Martial Arts Council Grand Champion.  Philip has been a semi-finalist on America's Got Talent, as well as a contestant on two of China’s top-rated reality competitions, Kung Fu Star and Jackie Chan’s Disciple.  In 2008 & 2009 He toured as a martial arts ‘Ninja’ performer for Tina Turner’s 50th Anniversary World Tour.  He has taught martial arts extensively and represented America twice at the World Traditional Wushu Festival in China where he won both gold and silver medals for the U.S. Team.  In 2010 he founded the group "Kung Fu Heroes" an international martial arts team whose mission is to unite individuals seeking to become "Heroes" and positive role models in local and worldwide communities and currently resides as a head teacher at South Coast Martial Arts in Costa Mesa. Irshaad "The White Tiger" Sayed (born 30 March 1989) is a South African national kickboxing champion, two time Muay Thai world champion and mixed martial arts champion who is currently signed with EFC Worldwide: Extreme Fighting Championship and is the Interim EFC Bantamweight Champion.  He is a former 135 lbs Chinese National MMA Champion. Mixed Martial Arts Pakistan (or PAK MMA) is the premiere mixed martial arts (MMA) and martial arts promotion based in Pakistan that was created in December 2007 by Bashir Ahmad to promote martial arts (and martial sports such as boxing and wrestling) styles in Pakistan with a particular focus on mixed martial arts competition. Russ Hogue (born December 26, 1974) is an American kickboxer from Belleville, Illinois.  He started training in martial arts under three time world kickboxing champion Jim Boucher in Belleville, Illinois.  He was also a member of a National Karate competition team with other notable athletes such as Bridgett Riley (World Boxing/Kickboxing Champion), Patrick Riley (mixed martial arts champion), Donny Reinhardt (North American Kickboxing Champion).
Answer: 2013