user: Question: Which decile has an Area of Welcome Bay, and an Authority of State?
Columns: ['Name', 'Gender', 'Area', 'Authority', 'Decile']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Aquinas College', 'Coed', 'Pyes Pa', 'State integrated', 9.0]
SQL:

assistant: SELECT "Decile" FROM "Table" WHERE "Area" = 'Welcome Bay' AND "Authority" = 'State';