Dee ihe na-aga n'ihu maka paragraf a - Sjefke Janssen (28 Ọktoba 1919 <unk> 3 Disemba 2014) bụ onye ọgba tum tum na-agba ịnyịnya ígwè Dutch. A kacha mara ya maka ọla nchara ya n'ọsọ Elite nke UCI Road World Championships nke 1947
Ọ dị mma. Janssen bụ onye na-agba ịnyịnya ígwè ọkachamara site na 1946 ruo 1954. Mgbe ọ lara ezumike nká, ọ ghọrọ onye njikwa ndị na-agba ịnyịnya ígwè ma nwee ụlọ ahịa ịnyịnya ígwè na Elsloo.