Context_1 : K-1 Grand Prix '99 Final Round was a martial arts event promoted by the K-1 organization. It was the seventh K-1 World Grand Prix final involving eight of the world's best fighters, with all bouts fought under K-1 Rules. The eight finalists had all qualified via elimination fights at the K-1 World Grand Prix '99 Opening Round. Also on the card was a number of 'Freshman Fights' and an 'Opening Fight' fought under a mixture of Jiu-Jitsu and K-1 Rules (various weight class) and two 'Super Fights' fought under K-1 Rules (various weight classes). In total there were twenty fighters at the event, representing eight countries. Context_2 : K-1 World Grand Prix 2004 Final was a kickboxing event promoted by the K-1 organization. It was the twelfth K-1 World Grand Prix final, involving twelve of the world's best K-1 fighters (four being reservists) from eight countries, with all bouts fought under K-1 Rules (100 kg/156-220 lbs). The tournament qualifiers had almost all qualified via the K-1 World Grand Prix 2004 Final Elimination with the exception of Remy Bonjasky who was the reigning champion. Context_3 : K-1 World Grand Prix 2003 Final was a kickboxing event promoted by the K-1 organization. The event was held at the Tokyo Dome in Tokyo, Japan on Saturday,December 6, 2003 in front of 67,320 spectators. It was the eleventh K-1 World Grand Prix final involving ten of the world's best fighters (two being reservists). The eight finalists had almost all qualified via preliminary events, while two additional fighters were invited as reserve fighters (for more detail on this see bulleted list below), with all bouts being fought under K-1 Rules (100 kg/156-220 lbs). As well as tournament bouts there was also an 'Opening Fight' between Yusuke Fujimoto and Matthias Riccio and a 'Super Fight' between Martin Holm and Jan Nortje, both fought under K-1 Rules. In total there were fourteen fighters at the event, representing ten countries. Context_4 : Ben "The Guvner" Edwards (born 17 February 1985) is an Australian Super Heavyweight kickboxer and Heavyweight boxer. He is the current K-1 World Grand Prix 2010 in Canberra tournament champion. Edwards won the tournament by three 1st round KO's the fastest win in K-1 history in total time of 3 minutes and 28 seconds breaking the previous record held by Jerome Le Banner of 4 minutes and 4 seconds in K-1 World Grand Prix 2001 in Osaka. Fighting out of Bulldog Gym, Canberra, Australia, he has competed in the K-1, Capital Punishment, Kings of Kombat, SUPERKOMBAT and It's Showtime promotions and is currently signed to GLORY. Context_5 : K-1 World Grand Prix 2008 Final was a martial arts event held by the K-1 on Saturday December 6, 2008 at the Yokohama Arena in Yokohama, Japan. It was the 16th K-1 World GP Final, the culmination of a year full of regional elimination tournaments. All fights followed the classic 8-man tournament format and were conducted under K-1 rules; three rounds of three minutes each, with a possible tiebreaker. The qualification for the top eight fighters in this event was held at K-1 World Grand Prix 2008 in Seoul Final 16. Context_6 : Kyotaro (Kyōtarō , born 23 June 1986) is a Japanese heavyweight boxer and former kickboxer. His real name is Kyotaro Fujimoto, and he had been using 3 other ring names before. He is known for his right hook which has knocked out many of his opponents. He is currently the K-1 Heavyweight Champion and has successfully defended the title against Peter Aerts at K-1 World Grand Prix 2010 in Yokohama. He was also the K-1 World Grand Prix 2008 in Fukuoka tournament finalist and K-1 Young Japan GP 2007 champion. Context_7 : K-1 World Grand Prix 2005 in Tokyo Final was a kickboxing event promoted by the K-1. The event was held at the Tokyo Dome in Tokyo, Japan on Saturday, November 19, 2005 in front of 58,213 spectators. It was the thirteenth K-1 World Grand Prix final, involving twelve of the world's best K-1 fighters (four being reservists), with all bouts fought under K-1 Rules (100 kg/156-220 lbs). The tournament qualifiers had almost all qualified via the K-1 World Grand Prix 2005 in Osaka - Final Elimination with the exception of Remy Bonjasky who was the reigning champion. As well as tournament matches there was also an 'Opening Fight' fought under K-1 Rules between Patrick Barry and Alexander Pitchkounov. In total there were fourteen fighters at the event, representing eleven countries. Context_8 : K-1 World Grand Prix 2010 Final was a martial arts event that was held by the K-1 on Saturday, December 11, 2010. It was the 18th K-1 World GP Final, the culmination of a year full of regional elimination tournaments. All fights followed K-1's classic tournament format and was conducted under K-1 Rules, three rounds of three minutes each, with a possible tiebreaker. The qualification for the top eight fighters was held at the K-1 World Grand Prix 2010 in Seoul Final 16 on October 2, 2010 in Seoul, Korea. Context_9 : Peter Aerts (born October 25, 1970) is a Dutch semi-retired super heavyweight kickboxer. Known for his devastating high kicks, which earned him the nickname "The Dutch Lumberjack", he is widely considered to be one of the greatest heavyweight kickboxers ever. Context_10 : K-1 World Grand Prix 2010 in Seoul Final 16 was a martial arts event held by the K-1 on Saturday, October 2, 2010 at the Olympic Gymnastics Arena in Seoul, Korea. It was the Final Elimination tournament for top sixteen fighters. The winners have qualified for the K-1 World Grand Prix 2010 Final held on December 11, 2010 at Yokohama Arena, Japan. fact_1 :  He is currently the K-1 Heavyweight Champion and has successfully defended the title against Peter Aerts at K-1 World Grand Prix 2010 in Yokohama. fact_2 :  Known for his devastating high kicks, which earned him the nickname "The Dutch Lumberjack", he is widely considered to be one of the greatest heavyweight kickboxers ever. Answer: "The Dutch Lumberjack"
Output: What is the nickname of the challenger who at the K1 World Grand Prix 2010 in Yokohama was defeated by Kyotaro Fujimoto?