user: Question: What is the last number in season of the episodes written by Dan Vebber?
Columns: ['№', '#', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [487.0, 1.0, '" The Falcon and the D\'ohman "', 'Matthew Nastuk', 'Justin Hurwitz', 'September25,2011', 'NABF16', '8.08']
SQL:

assistant: SELECT MAX("#") FROM "Table" WHERE "Written by" = 'Dan Vebber';