sentences:  He also won silver medals at the 1971 and 1973 European championships and 1974 World Championships.Năstac took up boxing in 1967 at Constructorul Galați, coached by Grigore Jelesneac and Petre Mihai.While serving with the Romanian Army he moved to Steaua Bucureşti, where he stayed for the rest of his career, first as competitor and after 1978 as coach.