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/GettyImages-81685121-5b2958833418c6003658aebe.jpg "Women's 800-Meter World Records")
Women's 800-Meter World Records
4 × 400 metres relay - Wikipedia
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/michaeljohnsonWR400-ShaunBotterill-56a6cc653df78cf77290225c.jpg "Men's 400-Meter World Records")
Men's 400-Meter World Records
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List of world records in athletics - Wikipedia
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