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By Aug. 16, as the Rio Olympics were halfway over, many had logged historic triumphs, including ______, the most decorated Olympian in history, who won his 23rd and final gold medal on Aug. 13; SIMONE BILES, the world’s best gymnast, who won the women’s individual all-around gold medal on Aug. 11; _______, who became the first African-American woman to win an individual swimming event at the Olympics; and _______ of Jamaica, called the fastest man in the world, who was the first sprinter to win three straight Olympic 100-meter titles.
Who is "MICHAEL PHELPS", "SIMONE MANUEL", and "USAIN BOLT"?