What year was Otto Passman (d) unopposed first elected?
CREATE TABLE table_1341690_18 (
    first_elected INTEGER,
    candidates VARCHAR
)
SELECT MAX(first_elected) FROM table_1341690_18 WHERE candidates = "Otto Passman (D) Unopposed"
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 Otto Passman (d) unopposed first elected? ### Input: CREATE TABLE table_1341690_18 (
    first_elected INTEGER,
    candidates VARCHAR
) ### Response: SELECT MAX(first_elected) FROM table_1341690_18 WHERE candidates = "Otto Passman (D) Unopposed"