CREATE TABLE table_1341690_9 (incumbent VARCHAR, candidates VARCHAR)

How many incumbent candidates in the election featuring sam m. gibbons (d) unopposed?
SELECT COUNT(incumbent) FROM table_1341690_9 WHERE candidates = "Sam M. Gibbons (D) Unopposed"
SELECT COUNT("incumbent") FROM "table_1341690_9" WHERE "Sam M. Gibbons (D) Unopposed" = "candidates"