user: Question: What is the maximum number of AFC championships?
Columns: ['Team', 'Division Titles', 'Playoff Berths', 'AFL Titles', 'AFC Championships', 'Super Bowl Championships']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['New England Patriots', 15.0, 19.0, 0.0, 7.0, 3.0]
SQL:

assistant: SELECT MAX("AFC Championships") FROM "Table";