<prompt> Qedela umusho olandelayo: UJoris Willem Eelco Tjebbes 5 Novemba 1929, Vlissingen 31 Julayi 2001, Hoogeveen wayengumbhukudi waseDutch we-freestyle. Wathola indondo yethusi emncintiswaneni  <response>: Ngo-1950 i-European Aquatics Championships futhi yancintisana kuma-Olimpiki asehlobo ka-1952. Phakathi kuka-1950 no-1952, uTjebbes wayengumpetha kazwelonke emjahweni wamamitha angu-100 no-400 futhi wabeka amarekhodi ayisishiyagalolunye kazwelonke emjahweni wamamitha angu-100, 200 no-400 wamahhala. 