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2009年8月20日,18岁的南非选手Caster Semenya在柏林田径世锦賽上获女子800米金牌,却引起对其性别的争论。怎么决定一个人的性别?
On August 20, 2009, Caster Semenya, an 18-year-old South African, won a 800-meter gold medal at the World Athletics World Championships in Berlin, raising controversy over her gender. How to decide a person’s gender?