user: Question: What was the air date of episode 5?
Columns: ['Episode Number', 'Air Date', 'Guest Host', 'Musical Guest (Song performed)', 'Coat Of Cash Wearing Celebrity']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '21 March 2008', 'Elle Macpherson', 'Estelle ( American Boy )', 'Rhino']
SQL:

assistant: SELECT "Air Date" FROM "Table" WHERE "Episode Number" = 5.0;