Mezue ahịrịokwu na-esonụ: De Beck tụgharịrị na egwu na 1983 ma merie nke atọ (na nke ikpeazụ) aha Belgian nke ọrụ ya site na ịgba ọsọ 29:42.56 nkeji maka mita 10,000. Afọ ikpeazụ ya n'asọmpi ukwu bụ n'afọ 1987: ọ gbara onye nke iri asaa na atọ n'asọmpi nke afọ ahụ.
1987 IAAF World Cross Country Championships ma merie Zwijndrecht Marathon na oge nke 2:21:50 awa.