What's the average year for the Role of alvin seville simon seville david 'dave' seville, and a Title of the chipmunk adventure?
CREATE TABLE table_name_30 (
    year INTEGER,
    role VARCHAR,
    title VARCHAR
)
SELECT AVG(year) FROM table_name_30 WHERE role = "alvin seville simon seville david 'dave' seville" AND title = "the chipmunk adventure"
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's the average year for the Role of alvin seville simon seville david 'dave' seville, and a Title of the chipmunk adventure? ### Input: CREATE TABLE table_name_30 (
    year INTEGER,
    role VARCHAR,
    title VARCHAR
) ### Response: SELECT AVG(year) FROM table_name_30 WHERE role = "alvin seville simon seville david 'dave' seville" AND title = "the chipmunk adventure"