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_42447 (
    "Year" real,
    "Title" text,
    "Producer" text,
    "Actor" text,
    "Role" text
)
SELECT AVG("Year") FROM table_42447 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_42447 (
    "Year" real,
    "Title" text,
    "Producer" text,
    "Actor" text,
    "Role" text
) ### Response: SELECT AVG("Year") FROM table_42447 WHERE "Role" = 'alvin seville simon seville david ''dave'' seville' AND "Title" = 'the chipmunk adventure'