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 |
| --- | --- | --- | --- | --- | --- |
| Texas 1 | Wright Patman | Democratic | 1928.0 | Re-elected | Wright Patman (D) Unopposed |
| Texas 2 | Jesse M. Combs | Democratic | 1944.0 | Re-elected | Jesse M. Combs (D) 93.3% Don Parker (R) 6.7% |
| Texas 4 | Sam Rayburn | Democratic | 1912.0 | Re-elected | Sam Rayburn (D) Unopposed |
| Texas 7 | Tom Pickett | Democratic | 1944.0 | Re-elected | Tom Pickett (D) Unopposed |
| Texas 9 | Clark W. Thompson | Democratic | 1947.0 | Re-elected | Clark W. Thompson (D) Unopposed |
| Texas 10 | Lyndon B. Johnson | Democratic | 1937.0 | Retired to run for U.S. Senate Democratic hold | Homer Thornberry (D) Unopposed |
| Texas 13 | Ed Gossett | Democratic | 1938.0 | Re-elected | Ed Gossett (D) Unopposed |
| Texas 15 | Milton H. West | Democratic | 1933.0 | Retired Democratic hold | Lloyd Bentsen (D) Unopposed |
| Texas 17 | Omar Burleson | Democratic | 1946.0 | Re-elected | Omar Burleson (D) Unopposed |
| Texas 18 | Eugene Worley | Democratic | 1940.0 | Re-elected | Eugene Worley (D) 88.7% J. Evetts Haley (R) 11.3% |
| Texas 20 | Paul J. Kilday | Democratic | 1938.0 | Re-elected | Paul J. Kilday (D) 75.3% J. P. Ledvina (R) 24.7% |
Question:
When the result is retired to run for U.S. Senate Democratic Hold, who is the candidate?
Answer:
Homer Thornberry (D) Unopposed