 Complete the following phrase:  Fritz Nachmann born 16 August 1929 is a West German former luger who competed during the 1950s and the 1960s. He was born in Kreuth. He won the bronze medal in the mens doubles event at the 1968 Winter Olympics in Grenoble. Nachmann also won five medals at the FIL World Luge Championships with four medals in mens doubles gold: 