[Answer] "Who's on First?" is a comedy routine made famous by which duo?

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"Who's on First?" is a comedy routine made famous by which duo?

• Abbott & Costello:"Who's on First?" is a comedy routine made famous by comedy duo Bud Abbott and Lou Costello. The premise of the sketch is that Abbott is identifying the players on a baseball team for Costello, using clever wordplay. The names and nicknames of the players are interpreted as non-responsive answers to Costello's questions. For example, the first baseman is named "Who"; thus, the utterance "Who's on first" is ambiguous between the question ("Which person is the first baseman?") and the answer ("The name of the first baseman is 'Who'").

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