What year was the aircraft retired when it was replaced by 737-300s?
CREATE TABLE table_name_91 (
    retired VARCHAR,
    notes VARCHAR
)
SELECT retired FROM table_name_91 WHERE notes = "replaced by 737-300s"
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 year was the aircraft retired when it was replaced by 737-300s? ### Input: CREATE TABLE table_name_91 (
    retired VARCHAR,
    notes VARCHAR
) ### Response: SELECT retired FROM table_name_91 WHERE notes = "replaced by 737-300s"