user: Question: what is the maximum value for afc cup
Columns: ['Pos', 'Member Association', 'Points (total 500)', 'Clubs', 'Group stage', 'Play-off', 'AFC Cup']
Types: ['real', 'text', 'real', 'text', 'real', 'real', 'real']
Sample row: [1.0, 'Japan', 470.0, '18', 4.0, 0.0, 0.0]
SQL:

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