user: ### NOW ANSWER:
Question: Who was the interview subject when the centerfold model was Sherry Arnett?
Columns: ['Date', 'Cover model', 'Centerfold model', 'Interview subject', '20 Questions', 'Pictorials']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1-86', 'no model pictured', 'Sherry Arnett', 'Ruth Westheimer', 'Jay Leno', 'Iman , Melanie Griffith']
SQL:

assistant: SELECT COUNT("Interview subject") FROM "Table" WHERE "Centerfold model" = 'Sherry Arnett';