 Joop Demmenie 19 Zvita 1918 3 Chikumi 1991 aive mutyairi webhasikoro kubva kuNetherlands. Pashure pokunge apedza wechina mumakwikwi eamateur mumugwagwa pa1937 UCI Road World Championships, akahwina menduru yebronze pa1938 UCI Road World Championships mumakwikwi evarume emugwagwa. Akanga ari mutyairi webhasikoro pakati pa1939 na1948. Muna 1939 akakunda muBrussels-Hozémont. 