Question: What is the name of the Brazilian mixed martial artist and Brazilian Jiu-Jitsu practitioner, whose associated is affiliated with the ZenQuest Martial Arts Center?

Context paragraphs:
Wallid Ismail: Wallid Farid Ismail (born February 23, 1968) is a Brazilian mixed martial artist and promoter.  Ismail holds a black belt in Brazilian jiu-jitsu (BJJ) under Carlson Gracie, and is an IVC mixed martial arts world champion and BJJ Champion.  In mixed martial arts, Ismail also competed for the UFC, and PRIDE, and most of wins in the sport came by way of submission.

Renzo Gracie: Renzo Gracie ( ; ] ; born March 11, 1967) is a Brazilian mixed martial artist and Brazilian Jiu-Jitsu practitioner.  A member of the Gracie family of Brazil, Renzo is a 6th Degree Black in Brazilian Jiu-Jitsu under Carlos Gracie Jr..  He is the son of Robson Gracie, grandson of Carlos Gracie, nephew of Carlos Gracie, Jr. grandnephew of Helio Gracie, and the 1st cousin once removed of Royce Gracie.  In mixed martial arts, Renzo has competed in the Ultimate Fighting Championship, Pride Fighting Championships, K-1, RINGS, and International Fight League (head-coaching the New York Pitbulls).  He holds notable victories over five former UFC Champions: Frank Shamrock (UFC Light Heavyweight Champion), Carlos Newton (UFC Welterweight Champion), Pat Miletich (UFC Welterweight Champion), Maurice Smith (UFC Heavyweight Champion), and Oleg Taktarov (UFC 6 Tournament Winner)

Rodrigo Gracie: Rodrigo Gracie (born March 11, 1975) is a retired Brazilian mixed martial artist and Brazilian Jiu-Jitsu practitioner.  A member of the famous Gracie family, Rodrigo is a 5th Degree Black Belt in Gracie Jiu-Jitsu and a Gold Medalist in the 1998 ADCC Submission Wrestling World Championship.  While competing in PRIDE Fighting Championships, Gracie was ranked amongst the top Middleweight fighters from 2003 to 2004 due to an undefeated streak with consecutive victories over Hayato Sakurai, Daiju Takase, Yuki Sasaki, and Daijiro Matsui.

Mariusz Linke: Mariusz Ryszard Linke (born July 31, 1969) is a Polish professional mixed martial artist and grappler who is most notable for being the first Polish born black belt in Brazilian jiu-jitsu, the highest ranking active Polish judoka and BJJ practitioner in both mixed martial arts and grappling, and one of the most decorated grapplers in Poland, he is also the first Polish grappler to travel to Brazil and receive training under a Gracie trained Brazilian jiu-jitsu black belt.  Linke has notably competed in the European Championship, NAGA, Grapplers Quest, ADCC and the Pan American Games.  Linke is currently in talks with top Polish promotion Konfrontacja Sztuk Walki to negotiate a 2 fight contract to close out his mixed martial arts career by the end of 2015, Linke has stated despite retiring from fighting he will still continue his grappling career and is rumored to be in the 2014 ADCC Polish Trials to enter the 2015 ADCC World Championship.

Robson Moura: Robson Moura Fonseca is a Brazilian Jiu Jitsu competitor, instructor and a mixed martial artist.  He started training in Brazilian Jiu Jitsu at the age of 10 in Teresópolis, Brazil.  His first Brazilian Jiu-Jitsu teacher was Ailson "Jucão" Brites, though Moura attained the rank of black belt at the age of 18 from Nova União co-founder Andre Pederneiras.  Today Moura holds a 5th degree black belt in Brazilian Jiu-Jitsu under Professor Brites.  He has a mixed martial arts record of 2-1-1.

Demian Maia: Demian Augusto Maia Baptista (] born November 6, 1977) is a Brazilian mixed martial artist and Brazilian Jiu-Jitsu practitioner.  He currently fights as a welterweight for the Ultimate Fighting Championship.  As of May 20, 2017, he is #1 in the official UFC welterweight rankings.  Maia is regarded as one of the greatest grapplers in MMA history.

Mackenzie Dern: Mackenzie Lynne Dern (born March 24, 1993) is a Brazilian Jiu-Jitsu practitioner and mixed martial artist.  IBJJF ranks Mackenzie as the number one female black belt in brazilian jiu-jitsu.  She holds a black belt under her father, Wellington "Megaton" Dias who is one of the top Brazilian jiu-jitsu black belts in the world.  She is an ADCC and no gi BJJ (black belt) World Champion.

Alvin Aguilar: Arthur Alvin A. Aguilar is a martial artist and Mixed Martial Arts promoter better known as "Alvin Aguilar".  He was born on April 28, 1974 in Bacolod, Philippines.  He is the president and founder of the The Universal Reality Combat Championship (URCC, 2002–present); He is also the founder and head coach of DEFTAC Ribeiro Jiu-jitsu Philippines (DEFTAC, 1996–present.)  and now currently serving as the president of the Wrestling Association of the Philippines.  He started training in martial arts at the age of 9, first in Karate, Arnis and Greco-Roman Wrestling.  Having spent over 30 years of his life to the study of multiple martial arts forms including Sari-an, Brazilian Jiu-Jitsu, Yaw Yan, Pekiti, etc.  He has developed his own unique fighting style specializing in grappling, knife and street fighting.  He is also known for being the first home-grown Filipino Brazilian Jiu-jitsu Black belt.

ZenQuest Martial Arts Center: ZenQuest Martial Arts Center, formerly called the Okinawan Karate School, is a martial arts school located in Lenox, Massachusetts.  The oldest martial arts school in Berkshire County, it was founded in 1972 as a dojo for Uechi-ryu karate.  The school since expanded to include other martial arts, and currently provides instruction in Shohei-ryu karate (a spin-off of Uechi-ryu), Brazilian jiu-jitsu, mixed martial arts, Muay Thai, boxing, wrestling, kobudo, and self-defense, and is the fastest growing martial arts community in Berkshire County.  The school also contains a store which provides equipment, gear, and instructional media.  It is affiliated with the Okinawan Karatedo Association, Demian Maia Jiu-Jitsu Association, and Team Sityodtong Boston, and is accredited by the North American Grappling Association.  ZenQuest has received significant coverage by regional and local media in Berkshire County, including "The Berkshire Eagle", "Berkshires' Best Buys, Business, and Beyond", and Pittsfield Cable Television, for its regular youth tournaments and seminars with high-ranking officials from the school's parent organizations.

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.

Supporting paragraphs: ZenQuest Martial Arts Center Demian Maia
Answer: Demian Maia