user: Question: Which Date has a Pictorials of Mercedes McNab, Girls of Hawaiian Tropic?
Columns: ['Date', 'Centerfold model', 'Interview subject', '20 Questions', 'Pictorials']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1-06', 'Athena Lundberg', 'Mark Cuban', 'Kate Beckinsale', 'Lisa Guerrero']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Pictorials" = 'Mercedes McNab, Girls of Hawaiian Tropic';