user: Question: What is the capacity for b national - basketball?
Columns: ['Club', 'Leagues', 'Venue', 'Location', 'Capacity', 'Established']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Panachaiki F.C.', 'Second Division - football', 'Kostas Davourlis Stadium', 'Agyia', 11321.0, 1891.0]
SQL:

assistant: SELECT "Capacity" FROM "Table" WHERE "Leagues" = 'b national - basketball';