Fritz Warncke
He competed at the 1972 Summer Olympics in Munich and at the 1976 Summer Olympics in Montreal . 
<triplet> 1972 Summer Olympics <subj> 1972 <obj> point in time <subj> Munich <obj> location <subj> 1976 Summer Olympics <obj> followed by <triplet> 1976 Summer Olympics <subj> 1972 Summer Olympics <obj> follows <subj> Montreal <obj> location