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 | John Dowdy Redistricted from 7th | Democratic | 1952.0 | Re-elected | John Dowdy (D) Unopposed |
| Texas 3 | Joe R. Pool Redistricted from at-large | Democratic | 1962.0 | Re-elected | Joe R. Pool (D) 53.4% Bill Hayes (R) 46.6% |
| Texas 4 | Ray Roberts | Democratic | 1962.0 | Re-elected | Ray Roberts (D) Unopposed |
| Texas 4 | Lindley Beckworth Redistricted from 3rd | Democratic | 1956.0 | Lost renomination Democratic loss | Ray Roberts (D) Unopposed |
| Texas 5 | Earle Cabell | Democratic | 1964.0 | Re-elected | Earle Cabell (D) 61.0% Duke Burgess (R) 39.0% |
| Texas 6 | Olin E. Teague | Democratic | 1946.0 | Re-elected | Olin E. Teague (D) Unopposed |
| Texas 8 | Lera Millard Thomas | Democratic | 1966.0 | Retired Democratic hold | Robert C. Eckhardt (D) 92.3% W. D. Spayne (R) 7.7% |
| Texas 9 | Jack Brooks Redistricted from 2nd | Democratic | 1952.0 | Re-elected | Jack Brooks (D) Unopposed |
| Texas 9 | Clark W. Thompson | Democratic | 1947.0 | Retired Democratic loss | Jack Brooks (D) Unopposed |
| Texas 12 | Jim Wright | Democratic | 1954.0 | Re-elected | Jim Wright (D) Unopposed |
| Texas 14 | John Andrew Young | Democratic | 1956.0 | Re-elected | John Andrew Young (D) Unopposed |
| Texas 15 | Kika de la Garza | Democratic | 1964.0 | Re-elected | Kika de la Garza (D) Unopposed |
| Texas 16 | Richard C. White | Democratic | 1964.0 | Re-elected | Richard C. White (D) Unopposed |
| Texas 17 | Omar Burleson | Democratic | 1946.0 | Re-elected | Omar Burleson (D) Unopposed |
| Texas 18 | Walter E. Rogers | Democratic | 1950.0 | Retired Republican gain | Bob Price (R) 59.5% Dee Miller (D) 40.5% |
| Texas 19 | George H. Mahon | Democratic | 1934.0 | Re-elected | George H. Mahon (D) Unopposed |
| Texas 21 | O. C. Fisher | Democratic | 1942.0 | Re-elected | O. C. Fisher (D) Unopposed |
Question:
What was the district who had their first elected in 1966?
Answer:
Texas 8