When did the oldest airline start operations?
CREATE TABLE table_15637071_1 (
    commenced_operations INTEGER
)
SELECT MIN(commenced_operations) FROM table_15637071_1
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: When did the oldest airline start operations? ### Input: CREATE TABLE table_15637071_1 (
    commenced_operations INTEGER
) ### Response: SELECT MIN(commenced_operations) FROM table_15637071_1