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Kenya's Geoffrey Kamworor (R) celebrates after winning men's title during IAAF World Half Marathon Championships in Valencia, Spain on March 24, 2018. (Xinhua/Guo Qiuda)

Kenya's Geoffrey Kamworor (R) celebrates after winning men's title during IAAF World Half Marathon Championships in Valencia, Spain on March 24, 2018. (Xinhua/Guo Qiuda)