Hans Wetterström
Wetterström also won four medals at the ICF Canoe Sprint World Championships with two golds ( K-2 10000 m: 1950 , K-4 1000 m: 1948 ) and two silvers ( K-4 1000 m: 1950 , K-4 10000 m: 1954 ) . 
<triplet> 1954 <subj> ICF Canoe Sprint World Championships <obj> instance of