user: Question: How many stadiums have Haka as the club?
Columns: ['Club', 'Location', 'Stadium', 'Capacity', 'Manager', 'Captain']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['FC Honka', 'Espoo', 'Tapiolan Urheilupuisto', 6000.0, 'Mika Lehkosuo', 'Tomi Maanoja']
SQL:

assistant: SELECT COUNT("Stadium") FROM "Table" WHERE "Club" = 'Haka';