Question: Which South Korean mixed martial artist has been defeated by George Roop?

full_context: Document 1: George Roop: George H. Roop (born November 10, 1981) is an American mixed martial artist. He was a cast member of Spike TV's "", winning his preliminary and first round fights. He fought as a bantamweight in the UFC and most recently fought under the Road FC banner. He holds notable victories over former WEC Bantamwight champion Brian Bowles and UFC featherweight contender Chan Sung Jung.
Document 2: Ranik Ultimate Fighting Federation: Ranik Ultimate Fighting Federation (RUFF) is the first Chinese mixed martial arts (MMA) organization sanctioned by the General Administration of Sport of China. The winners of the title fights will be crowned as the national MMA champions of China in their respective weight classes. RUFF held its first event in August 2011 in Shanghai, before presenting in Chongqing, Hohhot, Nanjing, and Sanya. In February 2013 RUFF awarded Championship belts in five weight classes, at their Superfight event. Together with the Championship belt, each winner was awarded 1,000,000 RMB. RUFF along with Mandt Bros. Productions produced and aired a 10 episode reality series "RUFF: Journey" leading up to the Superfight. A new episode will air each week and will be nationally televised across China with TV viewership of over 30 million, over 10 episodes.
Document 3: Lim Hyun-gyu: Lim Hyun-Gyu (born January 16, 1985), often anglicized to Hyun Gyu Lim, is a South Korean mixed martial artist, currently signed to fight in the UFC's Welterweight division.
Document 4: Robin Gracie: Robin Gracie is a Brazilian professional mixed martial artist and Brazilian Jiu-Jitsu practitioner. Robin is the youngest son of Hélio Gracie. He currently resides in Barcelona and runs the official Gracie Jiu-Jitsu Academy of Spain and teaches seminars throughout Europe and North America. He was a Vale Tudo competitor and was a 1998 ADCC Submission Wrestling World Championship Silver Medalist. Robin was trained by his father Hélio, and his brothers Royler Gracie, Rolker Gracie and Royce Gracie. Robin is also notable for a widely published no holds barred fight he took within his own academy, in what was part of one of the first "Gracie Challenge", against French journeyman fighter and black belt in BJJ, Damien Riccio in 2001.
Document 5: Rory Singer: Rory Michael Singer (born May 28, 1976) is an American mixed martial artist. Although Rory had begun making a name for himself as a 185-pound prospect; his big break came after meeting the producers of TUF. They were filming Forrest Griffin at The HardCore Gym for his fight against Stephan Bonnar in the finals of season 1. Forrest went on to win Season 1 and Rory was approached soon after to appear on Season 3.
Document 6: Joe Son: Joseph Hyungmin Son (Korean: 손형민 ; born November 22, 1970) is a South Korean-born American convicted felon and a former mixed martial artist and actor. He is currently serving life in prison in California for torture.
Document 7: Chan Sung Jung: Jung Chan-sung (Korean: 정찬성 born March 17, 1987, anglicized as Chan Sung Jung) is a South Korean mixed martial artist and kickboxer currently competing in the UFC's male Featherweight division. A professional competitor since 2007, Jung has also formerly competed for the WEC, Pancrase, World Victory Road, and DEEP. His nickname, "(The) Korean Zombie" comes from his ability to continue to move forward and fight aggressively, even after taking heavy blows. Jung was serving in the South Korean army until October 2016 and thus was not ranked by most MMA media outlets, however he was ranked as #5 in official UFC Featherweight rankings beforehand.
Document 8: Kang Kyung-ho: Kang Kyung-Ho (Korean: 강경호 , born September 9, 1987), often anglicized Kyung Ho Kang, is a South Korean mixed martial artist who competes in the UFC's bantamweight division.
Document 9: Dong Hyun Kim: Dong Hyun Kim (Korean: 김동현, 金東炫 ; born November 17, 1981) is a South Korean mixed martial artist currently fighting in the UFC's welterweight division. He was signed by the UFC after fighting in the Japanese promotion DEEP and in the South Korean promotion Spirit MC. As of 9 August, 2017, he is #12 in official UFC welterweight rankings.
Document 10: Choi Doo-ho: Choi Doo-Ho (born April 6, 1991), often anglicized to Dooho Choi or Doo Ho Choi, is a South Korean mixed martial artist who currently competes in the Ultimate Fighting Championship in their Featherweight division. As of March 2017, Choi is ranked #12 in the official UFC featherweight rankings.
Document 11: Bibiano Fernandes: Bibiano Fernandes da Silva Neto (born March 30, 1980) is a Brazilian professional mixed martial artist who has competed for K-1, DREAM, ONE Championship and King of the Cage. He was the first DREAM Featherweight Champion and DREAM Bantamweight Champion, and currently the ONE Bantamweight Champion. He is currently ranked as the #5 Bantamweight in the world by MMA Weekly and Fight Matrix as well as the #1 bantamweight outside of the UFC He is the main sparring partner of UFC Flyweight champion Demetrious Johnson.
Document 12: Forrest Griffin: Forrest Griffin (born July 1, 1979) is an American retired mixed martial artist and a UFC Hall of Famer. Since 2005, he has been signed to the Ultimate Fighting Championship where he is a former UFC Light Heavyweight Champion. Griffin, a former Georgia police officer, first rose to prominence after winning the first season of "The Ultimate Fighter". In the tournament finals, he fought and defeated Stephan Bonnar in Forrest Griffin vs. Stephan Bonnar, which is widely credited as sparking the current success of the UFC. He went on to serve as a coach on "The Ultimate Fighter 7" opposite Quinton Jackson.
Document 13: Cung Le: Cung Le (Vietnamese: "Lê Cung" ; born May 25, 1972) is a Vietnamese-born American actor, retired mixed martial artist and Sanshou kickboxer. He competed as a middleweight in the Ultimate Fighting Championship (UFC), holding a record of 2–2 with the organization. In Sanshou, he is a former International Kickboxing Federation Light Heavyweight World Champion, having a professional Sanshou record of 16–0 before moving to mixed martial arts (Le also held a kickboxing record of 17–0). He defeated Frank Shamrock to become the second Strikeforce Middleweight Champion before vacating the title to further pursue his acting career. Le is perhaps best known in mixed martial arts for competing in Strikeforce, holding a record of 7–1 with the organization before its demise.
Document 14: Kim Jong-man: Kim Jong-Man (born March 3, 1978), often anglicised to Jong-Man Kim, is a South Korean mixed martial artist who currently competes in the Featherweight division. While Kim has mostly fought in South Korea, he has also appeared in many Japanese promotions including, the Sengoku Raiden Championships, DEEP, Shooto, K-1 Hero's, and Russia's M-1 Global. He last fought at TOP FC - Original against Seung Hwa-Han.
Document 15: Shannon Ritch: Shannon Grey Ritch (born September 27, 1970) is an American professional mixed martial artist, boxer, professional wrestler and kickboxer, known for being the former Gladiators Challenge Heavyweight Champion and KOTC Middleweight Champion also current RUF Interim Heavyweight Champion and IFC Middleweight Champion. A professional competitor since 1998, Ritch has competed for the MFC, Pancrase, K-1, PRIDE, Rebel Fighting Championship, King of the Cage and the WEC. Ritch has also has been featured in two episodes of Walker, Texas Ranger as a Biker Gang Member and a character named Knight, Choke in 2011 as an extra, CSI Las Vegas as Thug #2, an episode of iCarly as a MMA Fighter, an episode of Numbers in 2010, an episode of Ultimate Soldier Challenge on the History Channel representing a military contracting company and most recently in 2017 the direct to DVD film, directed by Robert Parham, Bullets, Blades and Blood and upcoming in 2018 No Way Out directed by Jeffrey D. Parker. Shannon claims he has over 200 professional MMA fights 112 wins, 88 losses and 2 draws, some fights going undocumented and dating back as far as 1991. His documented record of fights goes back to 1998 with a record of 56 wins, 81 loses, and 4 draws. Shannon also holds a 2-1 record in professional boxing and a 25-2 record in bare knuckle boxing with all of his wins coming by way of knockout, in 2017 he was inducted into the Bare Knuckle Boxing Hall of Fame and also plans to round out his boxing career in 2018 against boxing superstar Bobby Gunn. Ritch is also an occasional professional wrestler, recently in mid 2017 main eventing a card in Guyana. Shannon has also found success as a grappler winning multiple NAGA, Grapplers Quest and Abu Dhabi Combat Club competitions, most recently winning a gold medal in the super heavyweight division at the Grand Canyon 2017 BJJ Open in Arizona and a silver medal at the '17 Arizona State BJJ Championships. Ritch is also an avid golf player, winning 1st place in many state and pro am competitions held within his native Arizona as recent as 2017.
ground_truth: Chan Sung Jung