 Complete the following phrase:  Jürgen Bremer born 26 September 1940 in Bützow is an East German retired slalom canoeist who competed from the early 1960s to the early 1970s. He won four medals at the ICF Canoe Slalom World Championships, with three golds folding K-1: 1963, K-1: 1967, K-1 team: 1967 and a silver K-1 team: 