user: Question: What is the roll of the school in Oakura?
Columns: ['Name', 'Years', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Ahititi School', '1–8', 'Ahititi', 'State', 5.0, 22.0]
SQL:

assistant: SELECT "Roll" FROM "Table" WHERE "Area" = 'Oakura';