user: Question: Who was the Centerfold model on 5-88?
Columns: ['Date', 'Cover model', 'Centerfold model', 'Interview subject', '20 Questions']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1-88', 'none', 'Kimberley Conrad', 'Arnold Schwarzenegger', 'Susan Dey']
SQL:

assistant: SELECT "Centerfold model" FROM "Table" WHERE "Date" = '5-88';