Question: Benjamin Saunders (born April 13, 1983), is an American mixed martial artist who currently fights in the Welterweight division of the UFC he was on fighting on Team Serra, Matthew John Serra (born June 2, 1974) is an American former professional mixed martial artist, Brazilian Jiu-Jitsu practitioner who competed for the Ultimate Fighting Championship and which occupation?

full_context: Document 1: Douglas Lima: Douglas Lima (born January 5, 1988) is a Brazilian mixed martial artist who competes in the welterweight division of Bellator, where he is the current Bellator Welterweight Champion, in his second reign. He is also the former MFC Welterweight Champion. Lima is currently ranked as the #6 Welterweight in the world by Fight!Magazine.
Document 2: Matt Serra: Matthew John Serra (born June 2, 1974) is an American former professional mixed martial artist, Brazilian Jiu-Jitsu practitioner who competed for the Ultimate Fighting Championship and stand up comic. He currently serves as a UFC on FOX analyst. Serra defeated Pete Spratt, Shonie Carter and Chris Lytle en route to becoming The Ultimate Fighter 4 Welterweight Tournament Winner. He captured the UFC Welterweight Championship immediately after, becoming the first of only four to win both accolades (along with Forrest Griffin, Rashad Evans, Michael Bisping). Serra also served as the head coach for "The Ultimate Fighter 6" reality show opposite Matt Hughes. In Brazilian Jiu-Jitsu, Serra holds a Silver Medal in the ADCC Submission Wrestling World Championship.
Document 3: Steve Carl: Steven Joseph "Steve" Carl (born December 20, 1984) is an American mixed martial artist. A professional MMA competitor since 2005, Carl previously competed for Bellator from 2010 to 2011 and currently competes in the Welterweight division for the World Series of Fighting. He is the former WSOF Welterweight Champion.
Document 4: Saul Almeida: Saul Almeida (born June 4, 1989) is a Brazilian-American professional mixed martial artist currently competing in the featherweight division for the World Series of Fighting. A professional mixed martial artist since 2008, Almeida has also formerly competed for Bellator.
Document 5: Ben Saunders (fighter): Benjamin Saunders (born April 13, 1983), is an American mixed martial artist who currently fights in the Welterweight division of the UFC. He was a featured fighter on "", fighting on Team Serra. A professional competitor since 2004, Saunders has also formerly competed for Bellator.
Document 6: 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 7: Ben Askren: Ben Askren (born July 18, 1984) is an American former amateur wrestler for the University of Missouri and U.S. Olympic team. He is now an active submission wrestler, mixed martial artist, and the former Bellator Welterweight Champion and the current ONE Welterweight Champion known for his unorthodox and effective wrestling. He is currently ranked as the #7 welterweight in the world by Fight!Magazine and as the #10 welterweight by Sherdog.
Document 8: Sean Sherk: Sean Keith Sherk (born August 5, 1973) is a retired American mixed martial artist and former UFC Lightweight Champion. Sherk competed in the Ultimate Fighting Championship and was one of the first combatants to have been a championship competitor in multiple weight divisions (having also competed for the UFC Welterweight Championship). He was the second UFC Lightweight Champion in the organization's history after Jens Pulver vacated his title 5 years earlier. Sherk also spent time competing in the Japan-based organizations, PRIDE Fighting Championships and Pancrase; going undefeated in both promotions. He holds one of the longest undefeated streaks in mixed martial arts history, with only four career losses, all to fellow-UFC Champions. Sherk announced his official retirement from mixed martial arts competition in September 2013 having last fought three years prior.
Document 9: Matt Hume: Matt Hume (born July 14, 1966) is an American mixed martial artist. He is the founder and head trainer at AMC Pankration in Kirkland, WA, which is home to UFC flyweight champion Demetrious Johnson, ONE bantamweight champion Bibiano Fernandes and he has trained numerous world class fighters including Josh Barnett, Tim Boetsch Bob Sapp, Chris Leben, Hayato Sakurai, Akira Shoji, Matt Brown, Rich Franklin, Mario Miranda and Caros Fodor.
Document 10: Jens Pulver: Jens Johnnie Pulver (born December 6, 1974) is an American professional mixed martial artist and undefeated boxer and kickboxer. Pulver was the inaugural UFC Lightweight Champion in addition to serving as the head coach on "The Ultimate Fighter 5" reality show against long-time rival B.J. Penn. In mixed martial arts, Pulver competed at the Lightweight, Featherweight, Bantamweight and Flyweight divisions in addition to competing at the Middleweight, Light Middleweight, and Welterweight divisions as a professional boxer. While perhaps best known for competing in the UFC, Pulver has also competed in Pride Fighting Championships, for the PRIDE 2005 Lightweight Grand Prix. He is to-date the youngest UFC Lightweight Champion in the UFC history, eventually relinquishing his title, after two defenses, due to a contract dispute. Pulver officially retired from combat sports in 2014. Pulver is considered the founder of the UFC lightweight division.
Document 11: Pat Miletich: Patrick Jay "Pat" Miletich ( ; born March 9, 1966) is a retired American mixed martial artist and a current sports commentator. He is known for his fights in the Ultimate Fighting Championship, where he became the first UFC Welterweight Champion and UFC 16 Welterweight Tournament Winner. Miletich is also known as a highly successful trainer and coach, having founded Miletich Fighting Systems. This camp is considered one of the most successful in MMA history and has produced several world champions. On July 6, 2014, he was inducted into the UFC Hall of Fame.
Document 12: The Ultimate Fighter: Team Hughes vs. Team Serra: The Ultimate Fighter 6: Team Hughes vs. Team Serra is the sixth season of the Ultimate Fighting Championship (UFC) produced reality television series "The Ultimate Fighter", and premiered on September 19, 2007 on Spike TV, after "UFC Fight Night 11". This season features only welterweight fighters (156–170 lb). The teams are coached by then-UFC welterweight champion Matt Serra and former welterweight champion Matt Hughes. The coaches were to fight for the Welterweight title after the completion of the show, on December 29 at UFC 79: Nemesis from the Mandalay Bay Events Center. However, due to an injury sustained by Serra, Hughes faced top contender Georges St-Pierre on the 29th, with St. Pierre defeating Hughes by submission in the second round and going on to challenge Serra for the undisputed welterweight title at a later date.
Document 13: Alessio Sakara: Alessio Sakara (born September 2, 1981) is an Italian professional mixed martial artist, former professional boxer and Sanshou kickboxer, currently competing in the Light Heavyweight and Middleweight division of Bellator MMA. A professional competitor since 2002, Sakara has also formerly competed for the UFC, Jungle Fight, Cage Warriors, and M-1 Global.
Document 14: Matt Hughes (fighter): Matthew Allen Hughes (born October 13, 1973) is a retired American mixed martial artist with a background in wrestling. He is a two-time UFC Welterweight Champion, UFC Hall of Fame inductee, and NJCAA Hall of Fame inductee. During his tenures in the Ultimate Fighting Championship, Hughes put together two separate six-fight winning streaks, defeated all the available opposition in the welterweight division, and defended the belt a then-record seven times. Hughes was inducted into the UFC Hall of Fame in May 2010 during the UFC Fan Expo in conjunction with UFC 114.
Document 15: B.J. Penn: Jay Dee "B.J." Penn (born December 13, 1978) is an American professional mixed martial artist and Brazilian Jiu-Jitsu practitioner. Penn debuted and competed in the Ultimate Fighting Championship (UFC), and later in K-1. Prior to fighting for the UFC, he became the first American Gold medalist of the World Jiu-Jitsu Championship. In mixed martial arts, Penn has competed in the Featherweight, Lightweight, Welterweight, and Middleweight divisions. As a former UFC Lightweight Champion and UFC Welterweight Champion, he is one of only three fighters in UFC history to win titles in multiple weight classes. Penn was also a Co-champion in the UFC 41 Lightweight Tournament, due to an eventual draw opposite Caol Uno in the tournament finale. Through his tenures as champion, Penn unofficially unified the UFC Lightweight Championship (against Sean Sherk) and broke the all-time lightweight title defense record. Penn was inducted into the UFC Hall of Fame, as the inaugural inductee in the Modern-Era Wing by career-long rival Matt Hughes, during "International Fight Week" in July 2015.
ground_truth: stand up comic