CREATE TABLE table_77700 ("Episode Air Date" TEXT, "Audition City" TEXT, "Date" TEXT, "First Audition Venue" TEXT, "Callback Date" TEXT, "Callback Venue" TEXT, "Golden Tickets" FLOAT)

What audition city has a Callback Date of october 5 6, 2007?
SELECT "Audition City" FROM table_77700 WHERE "Callback Date" = 'october 5–6, 2007'
SELECT "Audition City" FROM "table_77700" WHERE "Callback Date" = 'october 5–6, 2007'