user: Question: What's the authority when the roll is 40?
Columns: ['Name', 'Years', 'Gender', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'real']
Sample row: ['Birdwood School', '1–8', 'Coed', 'Ranui', 'State', 1.0, 218.0]
SQL:

assistant: SELECT "Authority" FROM "Table" WHERE "Roll" = 40.0;