user: Question: Which is the Authority that has a Roll of 70?
Columns: ['Name', 'Years', 'Area', 'Authority', 'Decile', 'Roll']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Awahono School - Grey Valley', '1–8', 'Ahaura', 'State', '4', '84']
SQL:

assistant: SELECT "Authority" FROM "Table" WHERE "Roll" = '70';