user: Question: How many centerfolds were in the 9-98 issue?
Columns: ['Date', 'Cover model', 'Centerfold model', 'Interview subject', '20 Questions', 'Pictorials']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2-98', 'Daphne Deckers', 'Julia Schultz', "Conan O'Brien", 'Paul Thomas Anderson', "Juli Ashton and Doria of Playboy TV's Night Calls"]
SQL:

assistant: SELECT COUNT("Centerfold model") FROM "Table" WHERE "Date" = '9-98';