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?
Sentence (from "Graciano Rocchigiani"): Graciano Rocchigiani (born 29 December 1963) is a German former professional boxer who competed from 1983 to 2003.
Relevant evidence: No