user: Question: Who was the centerfold model in the issue where Fergie answered the "20 questions"?
Columns: ['Date', 'Cover model', 'Centerfold model', 'Interview subject', '20 Questions', 'Pictorials']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1-07', 'Pamela Anderson', 'Jayde Nicole', 'T. Boone Pickens', 'Ellen Pompeo', 'Pamela Anderson']
SQL:

assistant: SELECT "Centerfold model" FROM "Table" WHERE "20 Questions" = 'Fergie';