Question:  Ambrose Mendy (born August 1954) is a British boxing manager, advisor and sports agent, he has managed and/or advised Errol Christie among others during a career in boxing, he was a professional boxer and boxing trainer, of which nationality?
Sentence (from "Johnny Pritchett"): Johnny Pritchett (born 15 February 1943) is an English amateur welterweight and professional light middle/middle/light heavyweight boxer of the 1960s and '70s, and boxing manager of the 1970s and '80s, who as an amateur won the Amateur Boxing Association of England (ABAE) 1959 Junior Class-A title against B. Ford (St Peters ABC), boxing out of Bingham & District ABC, won the 1962 Amateur Boxing Association of England welterweight title, against Harry Dean (Oxford YMCA), boxing out of Bingham & District ABC, won the 1963 Amateur Boxing Association of England welterweight title, against Ralph Charles (West Ham ABC), boxing out of Bingham & District ABC, and represented England and won the silver medal at welterweight in the Boxing at the 1962 British Empire and Commonwealth Games in Perth, Australia, losing to Wallace Coe of New Zealand, and as a professional won the British Boxing Board of Control (BBBofC) British middleweight title, and British Commonwealth middleweight title, and was a challenger for the European Boxing Union (EBU) middleweight title against Juan Carlos Durán, his professional fighting weight varied from 153+1/4 lb , i.e. light middleweight to 162+1/2 lb , i.e. light heavyweight.
Relevant evidence: No