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Sydney McLaughlin of the United States breaks her own world....

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mark in the 400-meter hurdles at the world championships....

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By a few days, McLaughlin overtook Usain Bolt...

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as the second-youngest person to do the triple....

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22-year-old McLaughlin became the second-youngest...

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 track and field athlete in history to win the....

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three most prestigious awards in a single competition....

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Seb Coe, the president of World Athletics, gave .....

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McLaughlin a cheque for $100,000 during the medal ceremony....