Anna Pfeffer
Competing in three Summer Olympics , she won three medals with two silvers ( K-2 500 m: 1968 , 1976 ) and one bronze ( 1972: K-1 500 m ) . 
<triplet> Summer Olympics <subj> 1968 <obj> has part <subj> 1976 <obj> has part <subj> 1972 <obj> has part <triplet> 1968 <subj> 1972 <obj> followed by <triplet> 1972 <subj> 1968 <obj> follows