user: Question: What is the date of the episode with Ryan Stiles as performer 2, Colin Mochrie as performer 3, and Tony Slattery as performer 4?
Columns: ['Date', 'Episode', 'Performer 1', 'Performer 2', 'Performer 3', 'Performer 4']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['5 March 1993', 1.0, 'Greg Proops', 'Ryan Stiles', 'Colin Mochrie', 'Tony Slattery']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Performer 2" = 'Ryan Stiles' AND "Performer 3" = 'Colin Mochrie' AND "Performer 4" = 'Tony Slattery';