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What is the Kentucky Derby bugle call named? Play 'Who Knew' on TODAY

With the Kentucky Derby coming up Saturday, NBC Sports' Carolyn Manno joins Kathie Lee and Hoda for a Derby-centric edition of TODAY's "Who Knew?" trivia quiz. (BTW, the answer is: "Call to Post").
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/ Source: TODAY

With the Kentucky Derby coming up Saturday, NBC Sports’ Carolyn Manno joins Kathie Lee and Hoda for a Derby-centric edition of TODAY’s “Who Knew?” trivia quiz. (BTW, the answer is: “Call to Post”).