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Niklas Kaul of Germany celebrates after winning the gold in the men's decathlon at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 4, 2019. (Xinhua/Jia Yuchen)

Niklas Kaul of Germany celebrates after winning the gold in the men's decathlon at the 2019 IAAF World Athletics Championships in Doha, Qatar, Oct. 4, 2019. (Xinhua/Jia Yuchen)