Whakaotihia te rerenga e whai ake nei: I tiimata a Kosgei i tana umanga a-ao hei kaikawe whakawhiti whenua me te kaiwhaiwhai. I rongonui ia hei kaitakaro rangatahi i te tau 1997 i tana whiwhinga i te mētara parahi rangatahi i te
1997 IAAF World Cross Country Championships, a ka tae ia ki te 1997 IAAF Grand Prix Whakamutunga mo te 3000 mita steeplechase. I whakapumautia e ia tana whakapapa ma te whakatakoto i tetahi rekoata ao rangatahi mo te kaupapa.