Johannes Trefz
Johannes Trefz ( born 7 June 1992 in Starnberg ) is a German sprinter specialising in the 400 metres . 
<triplet> Johannes Trefz <subj> 7 June 1992 <obj> date of birth <subj> Starnberg <obj> place of birth <subj> German <obj> country of citizenship <triplet> Starnberg <subj> German <obj> country <triplet> 400 metres <subj> sprinter <obj> subclass of