user: Question: What county has exactly 17 casinos?
Columns: ['Casinos', 'County', 'Road', '1-Jul-08', 'FY07 $millions', 'FY08 $millions', 'FY09 $millions']
Types: ['real', 'text', 'text', 'real', 'text', 'text', 'text']
Sample row: [149.0, 'Clark', 'I-15', 1865746.0, '$10,538', '$10,172', '$9,081']
SQL:

assistant: SELECT "County" FROM "Table" WHERE "Casinos" = 17.0;