user: Question: How many audition city's are there with an episode air date of June 24, 2010?
Columns: ['Episode Air Date', 'Audition City', 'Audition Date', 'Audition Venue', 'Guest Fourth Judge']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['June 10, 2010', 'Florianópolis', 'April 10, 2010', 'Nego Quirido Sambadrome', 'Luiza Possi']
SQL:

assistant: SELECT COUNT("Audition City") FROM "Table" WHERE "Episode Air Date" = 'June 24, 2010';