What is the average roll for Fairfield school?
CREATE TABLE table_70661 (
    "Name" text,
    "Years" text,
    "Gender" text,
    "Area" text,
    "Authority" text,
    "Decile" real,
    "Roll" real
)
SELECT AVG("Roll") FROM table_70661 WHERE "Name" = 'fairfield school'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What is the average roll for Fairfield school? ### Input: CREATE TABLE table_70661 (
    "Name" text,
    "Years" text,
    "Gender" text,
    "Area" text,
    "Authority" text,
    "Decile" real,
    "Roll" real
) ### Response: SELECT AVG("Roll") FROM table_70661 WHERE "Name" = 'fairfield school'