Question: Robert "Bob" Schrijber, is a Dutch former mixed martial artist and kickboxer, his most famous student at the moment is which UFC fighter, a Dutch mixed martial artist who competes as a heavyweight in the UFC?
Context: Frank Shamrock (born Frank Alisio Juarez, III; December 8, 1972) is an American former mixed martial artist.  Shamrock was the first to hold the UFC Middleweight Championship (later renamed the UFC Light Heavyweight Championship) and retired as the four-time defending undefeated champion.  Shamrock was the No. 1 ranked pound for pound UFC fighter in the world during his reign as the UFC Middleweight Champion.  Shamrock has won numerous titles in other martial arts organizations, including the interim King of Pancrase title, the WEC Light Heavyweight Championship and the Strikeforce Middleweight Championship. Gegard Mousasi (born 1 August 1985), is a Dutch mixed martial artist and former kickboxer currently competing in Bellator MMA.  He is the former DREAM Light Heavyweight Champion, former DREAM Middleweight Champion, former Cage Warriors World Middleweight Champion and the former Strikeforce Light Heavyweight Champion, thus making Mousasi a four-time World Champion.  At the moment of his departure from UFC in July 2017, he was #4 in the official UFC middleweight rankings. Antônio Rodrigo Nogueira (] , born June 2, 1976), better known as Minotauro, is a semi-retired Brazilian mixed martial artist known for his technical mastery of Brazilian jiu-jitsu.  He won most of his fights via submissions.  He competed in the heavyweight division of the Ultimate Fighting Championship (UFC), where he is a former Interim UFC Heavyweight Champion.  He is the twin brother of UFC fighter Antônio Rogério Nogueira.  Nogueria rose to prominence in the Japanese promotion Pride Fighting Championships, where he was the first Pride Heavyweight Champion from November 2001 to March 2003, as well as a 2004 PRIDE FC Heavyweight Grand Prix Finalist.  He is one of only three men to have held championship titles in both Pride Fighting Championships and the Ultimate Fighting Championship (the others being Mauricio Rua and Mark Coleman). Robert "Bob" Schrijber (born March 3, 1965) is a Dutch former mixed martial artist and kickboxer.  He currently runs his own MMA and Muay Thai team in Wormer, Netherlands called Team Schreiber.  His most famous student at the moment is UFC fighter Stefan Struve.  He is internationally known as Bob Schreiber because the Dutch vowel 'ij' is very uncommon in other languages.  He holds the notable distinction of being one of the two fighters to lose to Melvin Manhoef by decision, the other one being Jae-young Kim, and the first to defeat and knock Manhoef out in professional mixed martial arts competition, Manhoef's other 27 wins come by KO/TKO. Daniel Jeffery Henderson (born August 24, 1970) is an American former mixed martial artist and Olympic wrestler, who last competed as a middleweight in the Ultimate Fighting Championship.  He was the last Strikeforce Light Heavyweight Champion and was the last Welterweight (80 kg ) and Middleweight (95 kg ) champion of Pride Fighting Championships.  Additionally, Henderson was the Brazil Open '97 Tournament Champion, the UFC 17 Middleweight Tournament Champion, the Rings: King of Kings 1999 Tournament Champion and the Pride Weltwerweight Grand Prix Tournament Champion.  During his career, Henderson also challenged for the UFC Middleweight Championship (2x), the UFC Light Heavyweight Championship and the Strikeforce Middleweight Championship.  He was the first mixed martial artist to concurrently hold two titles in two different weight classes in a major MMA promotion.  At the time of his retirement after UFC 204, he was the oldest fighter on the UFC roster.  Known to be one of the greatest mixed martial artists of all time having defeated a total of seventeen MMA world champions across four major MMA promotions (UFC, PRIDE FC, Strikeforce, and RINGS). Stefan Jaimy Struve ( ; born February 18, 1988) is a Dutch mixed martial artist who competes as a heavyweight in the Ultimate Fighting Championship (UFC).  At 7'0", he is the current tallest fighter on the roster. Kim Min-soo (born January 22, 1975) is a South Korean former judoka, professional mixed martial artist and K-1 kickboxer.  He is best known for becoming a K-1 World Grand Prix 2006 Finalist and also winning the 1996 Summer Olympics in Atlanta earning a Silver Medal in Judo.  He is also known for his fights with current WWE professional wrestler and former UFC Heavyweight Champion and veteran Brock Lesnar, former WWE wrestler and K-1 fighter Sean O'Haire and former NFL football player turned K-1 kickboxer and New Japan Pro Wrestling contender Bob Sapp.  Min-soo holds a notable kickboxing win over former UFC fighter Scott Junk.  He announced his retirement from contact sports in 2011 with brief stints as color commentator for Japanese and Korean mixed martial arts and professional wrestling events.  Kim is also the Judo head coach for Korean Top Team. Sebastiaan "Bas" Rutten (] ; born 24 February 1965) is a Dutch former mixed martial artist, kickboxer and professional wrestler.  He was a UFC Heavyweight Champion, a three-time King of Pancrase world champion, and finished his career on a 22 fight unbeaten streak (21 wins, 1 draw).  FightMetric wrote this when Rutten got inducted into the UFC Hall Of Fame: "FightMetric, the official statistics provider for the UFC, ran the numbers on Rutten’s career.  They back up the Dutchman’s inclusion into the UFC Hall of Fame and then some.  In the 4-hours, 27-minutes and 8-seconds he spent as a pro fighter, Rutten scored 13 knockdowns without getting dropped himself, his significant strike accuracy was 70.6%, the highest FightMetric has ever recorded, attempted a record 53 submissions and successfully swept his opponents a record 46 times."  From 2007–2016, Rutten was the co-host of Inside MMA on AXS TV. 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. Miesha Theresa Tate ( ; born August 18, 1986) is an American Mixed Martial Arts Pundit and former mixed martial artist who competed in the Ultimate Fighting Championship (UFC) and is a former UFC Women's Bantamweight Champion.  Primarily known for her grappling ability, Tate became a wrestler while attending Franklin Pierce High School in Tacoma, Washington and won a state championship during her senior year in 2005.  She began her professional mixed martial arts (MMA) career in 2007, and won the bantamweight championship of the Freestyle Cage Fighting promotion in 2009.  Tate gained increased recognition in 2011, when she won the Strikeforce Women's Bantamweight Championship.  She has also won a silver medal in the FILA Grappling Championships.
Answer: Stefan Struve