Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| District | Incumbent | Party | First elected | Result | Candidates |
| --- | --- | --- | --- | --- | --- |
| Florida 1 | Robert L. F. Sikes | Democratic | 1940.0 | Re-elected | Robert L. F. Sikes (D) Unopposed |
| Florida 2 | Don Fuqua | Democratic | 1962.0 | Re-elected | Don Fuqua (D) Unopposed |
| Florida 3 | Charles Edward Bennett | Democratic | 1948.0 | Re-elected | Charles Edward Bennett (D) Unopposed |
| Florida 4 | William V. Chappell, Jr. | Democratic | 1968.0 | Re-elected | William V. Chappell, Jr. (D) Unopposed |
| Florida 5 | Richard Kelly | Republican | 1974.0 | Re-elected | Richard Kelly (R) 59.0% JoAnn Saunders (D) 41.0% |
| Florida 7 | Sam M. Gibbons | Democratic | 1962.0 | Re-elected | Sam M. Gibbons (D) 65.7% Dusty Owens (R) 34.3% |
| Florida 8 | James A. Haley | Democratic | 1952.0 | Retired Democratic hold | Andy Ireland (D) 58.0% Bob Johnson (R) 42.0% |
| Florida 10 | Louis A. Bafalis | Republican | 1972.0 | Re-elected | Louis A. Bafalis (R) 66.3% Bill Sikes (D) 33.7% |
Question:
who is the incumbent where the candidates is william v. chappell, jr. (d) unopposed?
Answer:
William V. Chappell, Jr.