user: Question: What is the maximum season number for the episode written by Jonathan Greene?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [225.0, 1.0, '"Unstable"', 'Arthur W. Forney', 'Judith McCreary', 'September23,2009', 11001.0, '8.36']
SQL:

assistant: SELECT MAX("No. in season") FROM "Table" WHERE "Written by" = 'Jonathan Greene';