SELECT "Callback Date" FROM table_11084 WHERE "Date" = 'july 29, 2008'
What was the callback date for the auditions held on July 29, 2008?
CREATE TABLE table_11084 (
    "Episode Air Date" text,
    "Audition City" text,
    "Date" text,
    "First Audition Venue" text,
    "Callback Date" text,
    "Callback Venue" text,
    "Golden Tickets" real
)