user: Question: From writer Denne Bart Petitclerc, what is the maximum season number?
Columns: ['Series #', 'Season #', 'Title', 'Director(s)', 'Writer(s)', 'Airdate', 'Production code', 'Arties disguises']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [60.0, 4.0, '"The Night Dr. Loveless Died"', 'Alan Crosland Jr.', 'Henry Sharp', 'September29,1967', 65.0, 'Dr. Roman De Petritier']
SQL:

assistant: SELECT MAX("Season #") FROM "Table" WHERE "Writer(s)" = 'Denne Bart Petitclerc';