Rubuta ci gaba don wannan sakin layi - Jans Koster (an haife shi a 1938) ɗan tseren tseren Dutch ne mai ritaya. Ta lashe lambar zinare a gasar zakarun Turai ta 1958
(400 m) kuma ya kafa tarihin Turai biyu da na duniya biyu a 1500 m a cikin 1956<unk>1957. A ranar 9 ga Maris 1960 ta auri Ben Hulsegge.