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Caster Semenya (front) of South Africa competes during the Women's 1500M of 2018 Doha IAAF Diamond League in Doha, capital of Qatar, May 4, 2018. (Xinhua/Nikku)

Caster Semenya (front) of South Africa competes during the Women's 1500M of 2018 Doha IAAF Diamond League in Doha, capital of Qatar, May 4, 2018. (Xinhua/Nikku)