Question: In what year was the younger of the two brother boxers, Lucas Martin Matthysse and Walter Dario Matthysse, born?

full_context: Document 1: Walter Matthysse: Walter Dario Matthysse (born August 29, 1978) is an Argentine former professional boxer who competed from 2002 to 2009, and challenged once for the IBF welterweight title in 2007. He is the elder brother of professional boxer Lucas Matthysse.
Document 2: Juan Manuel Márquez vs. Joel Casamayor: Juan Manuel Márquez vs. Joel Casamayor was a boxing lightweight superfight. In 2008 reigning lightweight Champion "El Cepillo" Casamayor met former two-division World Champion Juan Manuel "Dinamita" Márquez at the MGM Grand Garden Arena in Las Vegas for a 12-round championship bout. Casamayor was the champion of boxing's lightweight division, recognized as the title holder by Ring Magazine, even though he didn't own any of the belts from boxing's four major sanctioning bodies.
Document 3: Andre Thysse: Andre Thysse ( (1968--) 07 1968 (age (2017)-(1968)-((11)<(02)or(11)==(02)and(30)<(07)) ) ) born in Germiston, is a South African professional super middle/light heavyweight boxer of the 1990s and 2000s who won the Gauteng super middleweight Title, South African super middleweight title, and Commonwealth super middleweight title, and was a challenger for the International Boxing Organization (IBO) super middleweight title against Brian Magee, World Boxing Council (WBC) super middleweight title against Markus Beyer, World Boxing Council (WBC) International super middleweight title against Mikkel Kessler, WBC International super middleweight title against Jürgen Brähmer, World Boxing Council (WBC) Continental Americas super middleweight title against Lucian Bute, World Boxing Council (WBC) International light heavyweight title against Adrian Diaconu, and International Boxing Federation (IBF) Australasian super middleweight title against Sakio Bika, his professional fighting weight varied from 163+3/4 lb , i.e. super middleweight to 175 lb , i.e. light heavyweight.
Document 4: Lucas Matthysse: Lucas Martin Matthysse (born September 27, 1982) is an Argentine professional boxer. He held the WBC interim super lightweight title from 2012 to 2013, and has challenged twice for a world title in 2013 and 2015. Matthysse is known for his aggressive pressure fighting style and formidable punching power. His older brother is former professional boxer Walter Matthysse.
Document 5: Walter Samuel: Walter Adrián Luján Samuel (] ; born Walter Adrián Luján; 23 March 1978) is a retired Argentine professional footballer. Gifted with natural power and good defensive skills, Samuel has been regarded as one of the best centre-backs of his generation, and as one of football's toughest defenders, with former international teammate and Inter captain Javier Zanetti referring to him as the "hardest player" he has played with.
Document 6: Rafael Márquez (boxer): Rafael Márquez Méndez (born 25 March 1975) is a Mexican former professional boxer who competed from 1995 to 2013. He is a two-time world champion in two weight classes, having held the IBF bantamweight title from 2003 to 2007; and the WBC, "Ring" magazine, and lineal super bantamweight titles in 2007. He also held the IBO bantamweight title from 2005 to 2007, and challenged once for WBO featherweight title in 2011. Márquez was known for his formidable knockout power and relentless pressure fighting style. His older brother Juan Manuel Márquez is also a professional boxer and multiple-time world champion.
Document 7: Klitschko brothers: Vitali Klitschko (born 19 July 1971) and Wladimir Klitschko (born 25 March 1976), collectively known as the Klitschko brothers are Ukrainian heavyweight boxers. During their peak years from 2004 until 2015, the Klitschko brothers were considered the most dominant heavyweight champions of their era, and amongst the most successful champions in boxing history. After the retirement of boxing legend Lennox Lewis, the Klitschko brothers held all heavyweight boxing world titles. Known for their exceptionally large frames and robotic boxing styles, the Klitschko brothers developed a style that utilized their athleticism and using their reach to break down opponents.
Document 8: Canelo Álvarez vs. Matthew Hatton: Canelo Álvarezz vs. Matthew Hatton was a 154-pound world title fight, that aired on HBO's "Boxing After Dark". Rising Mexican star Canelo Álvarez fought, and defeated former junior lightweight champion Ricky Hatton's younger brother Matthew Hatton in his first time headlining a big undercard in the United States. It was the first time for either fighter to challenge for a major belt in any division.
Document 9: Daulis Prescott: Daulis Prescott Consuegra (born 2 September 1986) is a Colombian professional boxer who has challenged once for the WBA featherweight title in 2012. His brother Breidis Prescott is also a professional boxer.
Document 10: Walter Montoya: Walter Iván Montoya (born 21 July 1993) is an Argentine professional footballer who plays as a central midfielder for Spanish club Sevilla FC.
Document 11: Lucas Browne: Lucas Browne (born 14 April 1979) is an Australian professional boxer and former mixed martial artist. In boxing he has held the Australian and Commonwealth heavyweight titles, and made history in March 2016 by becoming Australia's first world heavyweight boxing champion after winning the WBA (Regular) title. However, Browne was stripped of the title two months later for failing a drug test. This ruling was then overturned in September, clearing him of any wrongdoing. In November, Browne produced another positive drug test.
Document 12: Gianluca Branco: Gianluca Branco (born 20 September 1970) is an Italian professional boxer. He has held the European super-lightweight title twice, from 2001 to 2002, and 2008 to 2009; the European Union welterweight title from 2012 to 2013; the European welterweight title from 2014 to 2016; and has challenged twice for a world title, in 2004 and 2006. Gianluca is the younger brother of former boxer Silvio Branco.
Document 13: Charles Manyuchi: Charles Manyuchi is a Zimbabwean professional boxer who is the WBC, international welterweight champion since March 2014. In November 2014, he successfully defended his WBC crown in a Lusaka, Zambia fight against an opponent from Colombia. In 2014 he was awarded the Zimbabwe's Sportsperson of the year accolade. In July 2015 against an Italian boxer in Friuli-Venezia Giulia, he defended his crown successfully.In 2017 saw the fall of great man who was bound for glory and wider recognition internationally when he lost his title to Quadratilo from Singapore in what was referred as a huge upset in the boxing world especially to the fans back home. Coming back home,he received unwelcome remarks and comments from many fans but he however had support from government claiming to sue those who continued to attack him. The are currently plans to have a rematch.
Document 14: Daniel Santos (boxer): Daniel Santos Peña (born October 10, 1975) is a former professional boxer who competed from 1996 to 2009. As an amateur Santos represented Puerto Rico in international events, including the 1990 and 1992 Junior World Championships, Pan American Boxing Tournament, Goodwill Games, 1995 Pan American Games and the 1996 Summer Olympics, where he won a bronze medal in the Welterweight Division. Santos debuted as a professional in 1996. Santos won the World Boxing Organization Welterweight championship on May 6, 2000. On March 16, 2002 he vacated the welterweight division's championship in order to compete against Yori Boy Campas for the vacant World Boxing Organization Light middleweight championship. Santos defended this championship on four occasions, against Mehrdud Takaloo (in a fight where he won the World Boxing Union Light middleweight championship), Fulgencio Zúñiga, Michael Lerma and Antonio Margarito before losing it to Sergiy Dzindziruk by unanimous decision in a fight that took place on December 3, 2005. On July 11, 2008, Santos won his third professional championship, knocking out Joachim Alcine in six rounds to win the World Boxing Association's light middleweight title.
Document 15: Andre Thysse: Andre Thysse ( (1968--) 07 1968 (age (2017)-(1968)-((11)<(02)or(11)==(02)and(30)<(07)) ) ) born in Germiston, is a South African professional super middle/light heavyweight boxer of the 1990s and 2000s who won the Gauteng super middleweight Title, South African super middleweight title, and Commonwealth super middleweight title, and was a challenger for the International Boxing Organization (IBO) super middleweight title against Brian Magee, World Boxing Council (WBC) super middleweight title against Markus Beyer, World Boxing Council (WBC) International super middleweight title against Mikkel Kessler, WBC International super middleweight title against Jürgen Brähmer, World Boxing Council (WBC) Continental Americas super middleweight title against Lucian Bute, World Boxing Council (WBC) International light heavyweight title against Adrian Diaconu, and International Boxing Federation (IBF) Australasian super middleweight title against Sakio Bika, his professional fighting weight varied from 163+3/4 lb , i.e. super middleweight to 175 lb , i.e. light heavyweight.
ground_truth: 1982