CREATE TABLE table_1342270_5 (first_elected VARCHAR2, incumbent VARCHAR2)

William Fadjo Cravens is the only candidate who was first elected in 1939.
SELECT COUNT(first_elected) FROM table_1342270_5 WHERE incumbent = "William Fadjo Cravens"
SELECT COUNT("first_elected") FROM "table_1342270_5" WHERE "William Fadjo Cravens" = "incumbent"