user: Question: What authority controls the school in Levin that has a decile of 6, and a roll of 226?
Columns: ['Name', 'Years', 'Gender', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Coley Street School', '1–8', 'Coed', 'Foxton', 'State', 2.0, 253.0]
SQL:

assistant: SELECT "Authority" FROM "Table" WHERE "Decile" = 6.0 AND "Area" = 'Levin' AND "Roll" = 226.0;