Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1341690_18 (first_elected INTEGER, candidates VARCHAR)
### Question:
What year was Otto Passman (d) unopposed first elected?
### Answer:
SELECT MAX(first_elected) FROM table_1341690_18 WHERE candidates = "Otto Passman (D) Unopposed"