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The first sentence should be disemboldened (MOS:BOLDTITLE).
"No Sierra Leonean athlete has ever won a medal at the Olympics": would precede with an {{as of}} template.
"They both qualified after meeting the 'A' and 'B' qualifying standards": replace the single quote marks (') with doubles (").
"and was 0.18 metres behind a qualification spot and therefore, Sesay did not advance to the final": would rephrase as "and was 0.18 metres behind a qualification spot, therefore not advancing to the final" to be less redundant.