What's the average year for the name aida-wedo dorsa with a diameter less than 450?
CREATE TABLE table_name_16 (
    year_named INTEGER,
    name VARCHAR,
    diameter__km_ VARCHAR
)
SELECT AVG(year_named) FROM table_name_16 WHERE name = "aida-wedo dorsa" AND diameter__km_ < 450
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 name aida-wedo dorsa with a diameter less than 450? ### Input: CREATE TABLE table_name_16 (
    year_named INTEGER,
    name VARCHAR,
    diameter__km_ VARCHAR
) ### Response: SELECT AVG(year_named) FROM table_name_16 WHERE name = "aida-wedo dorsa" AND diameter__km_ < 450