user: Question: What is the highest tonnage of the Brig Ship Type and the disposition of Ship of Prize?
Columns: ['Date', 'Ship Name', 'Tonnage', 'Ship Type', 'Location', 'Disposition of Ship']
Types: ['text', 'text', 'real', 'text', 'text', 'text']
Sample row: ['2 June 1814', 'Neptune', 207.0, 'Barque', 'English Channel', 'Burned']
SQL:

assistant: SELECT MAX("Tonnage") FROM "Table" WHERE "Ship Type" = 'Brig' AND "Disposition of Ship" = 'Prize';