 Complete the following phrase:  Schuck also won twenty medals at the ICF Canoe Sprint World Championships with twelve golds K-2 200 m: 1997, K-2 500 m: 1995, 1997; K-2 5000 m: 1990, 1991, 1993; K-4 200 m: 1997, K-4 500 m: 1993, 