user: Question: What was Performer 4's name when Performer 3 was Ryan Stiles on episode 14?
Columns: ['Date', 'Episode', 'Performer 1', 'Performer 2', 'Performer 3', 'Performer 4']
Types: ['text', 'real', 'text', 'text', 'text', 'text']
Sample row: ['18 January 1991', 1.0, 'Josie Lawrence', 'Greg Proops', 'Jim Sweeney', 'Tony Slattery']
SQL:

assistant: SELECT "Performer 4" FROM "Table" WHERE "Performer 3" = 'Ryan Stiles' AND "Episode" = 14.0;