CREATE TABLE table_1341672_10 (incumbent VARCHAR, candidates VARCHAR)

who is the incumbent where the candidates is william v. chappell, jr. (d) unopposed?
SELECT incumbent FROM table_1341672_10 WHERE candidates = "William V. Chappell, Jr. (D) Unopposed"
SELECT "incumbent" FROM "table_1341672_10" WHERE "William V. Chappell, Jr. (D) Unopposed" = "candidates"