Question: Did Monty Python write the Who's on First sketch?, Answer:No, Description of Monty Python's Flying Circus: British sketch comedy television series, Fact1: Who's on First debuted in 1945., Fact2: Monty Python's first show was in 1969.
Step1: When was the Who's on First sketch first performed?, Step2: When was the debut of the Monty Python show?, Step3: Is #2 before #1?, Wikipedia page for step 1: Who's on First?, Wikipedia page for step 2: Monty Python, Wikipedia page for step 3: , not_definitive_answer: False, incorrect_answer: False