CREATE TABLE table_name_30 (year NUMBER, role VARCHAR2, title VARCHAR2)

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