 Complete the following phrase:  Pietzsch also found great success at the FIL World Luge Championships with a total of six medals, including four gold Mens doubles: 1983, 1985, 1987; Mixed team: 1990 and two bronzes Mens doubles: 1989, 1990. He also won three medals at the FIL European Luge Championships with two golds Mens doubles and mixed team: both 