Question: What current world champion goes to an amateur boxing club that operates from a gym on the Lancaster West Estate that Olympic gold medalist who held the IBF super-middleweight title since 2015, having previously held the British super-middleweight title from 2010 to 2011, and the European super-middleweight title from 2011 to 2012 goes to as well?
Context: Graciano Rocchigiani (born 29 December 1963) is a German former professional boxer who competed from 1983 to 2003.  He is a two-weight world champion, having held the IBF super-middleweight title from 1988 to 1989, and the WBC light-heavyweight title in 1998.  Additionally he held the European light-heavyweight title from 1991 to 1992, and challenged twice for the WBO light-heavyweight title in 1996 and 2000. Nigel Gregory Benn (born 22 January 1964) is a British former professional boxer who competed from 1987 to 1996.  He is a two-weight world champion, having held the WBO middleweight title in 1990, and the WBC super-middleweight title from 1992 to 1996.  Additionally he held the Commonwealth middleweight title from 1988 to 1989.  Nicknamed "The Dark Destroyer" for his formidable punching power and aggressive fighting style, Benn is ranked by BoxRec as the fourth best British super-middleweight boxer of all time. George Groves (born 26 March 1988) is a British professional boxer.  He has held the WBA (Super) super-middleweight title since May 2017, and previously the European, British, and Commonwealth super-middleweight titles between 2010 and 2014.  As an amateur, Groves won the ABA middleweight title twice, in 2007 and 2008. Sakio Bika (born 18 April 1979) is a Cameroonian-Australian professional boxer.  He held the WBC super-middleweight title from 2013 to 2014, and previously the IBO super-middleweight title from 2008 to 2010.  In 2015 he challenged once for the unified light-heavyweight world title, and in 2007 won the third season of "The Contender" reality TV series. Mouhamed Ali Ndiaye (born 26 October 1979) is an Italian professional boxer.  He is a former European Union super-middleweight champion and has challenged twice for the European super-middleweight title. The Dale Youth boxing club is an amateur boxing club that operates from a gym on the Lancaster West Estate.  It successfully nutured dozens of champions including the young Olympic gold medal winner James DeGale and current world champion George Groves (boxer). Paul Smith Jr. (born 6 October 1982) is a British professional boxer.  He held the English middleweight title in 2008; the British super-middleweight title twice between 2009 and 2014; and has challenged three times for a super-middleweight world title. James Frederick DeGale, {'1': ", '2': ", '3': ", '4': "} (born 3 February 1986) is a British professional boxer.  He has held the IBF super-middleweight title since 2015, having previously held the British super-middleweight title from 2010 to 2011, and the European super-middleweight title from 2011 to 2012.  As of May 2017, he is ranked as the world's best super-middleweight by "The Ring" magazine and the Transnational Boxing Rankings Board, and third by BoxRec.  As an amateur, DeGale represented Great Britain at the 2008 Olympics, winning a gold medal in the middleweight division.  By later becoming IBF champion, he became the first British boxer ever to have won both an Olympic gold medal and a professional world title. Christopher Livingstone "Chris" Eubank Jr. (born 18 September 1989) is a British professional boxer.  He has held the IBO super-middleweight title since February 2017, having previously held the WBA interim and British middleweight titles between 2015 and 2016.  As of July 2017, Eubank Jr. is ranked as the world's second best super middleweight by BoxRec, sixth by the Transnational Boxing Rankings Board, and seventh by "The Ring" magazine.  He is the son of former two-weight world boxing champion Chris Eubank. Robin Reid (born 19 February 1971) is a British former professional boxer who competed from 1993 to 2012.  He held the WBC super-middleweight title from 1996 to 1997, and the IBO super-middleweight title from 2004 to 2005.  As an amateur, Reid represented Great Britain at 1992 Summer Olympics, winning a bronze medal in the light-middleweight division.
Answer: George Groves