Table:
0
A
B
C
D
E
F
1
District
Incumbent
Party
First elected
Result
Candidates
2
Texas 1
Wright Patman
Democratic
1928
Re-elected
Wright Patman (D) Unopposed
3
Texas 2
John Dowdy Redistricted from 7th
Democratic
1952
Re-elected
John Dowdy (D) Unopposed
4
Texas 3
Joe R. Pool Redistricted from at-large
Democratic
1962
Re-elected
Joe R. Pool (D) 53.4% Bill Hayes (R) 46.6%
5
Texas 4
Ray Roberts
Democratic
1962
Re-elected
Ray Roberts (D) Unopposed
6
Texas 4
Lindley Beckworth Redistricted from 3rd
Democratic
1956
Lost renomination Democratic loss
Ray Roberts (D) Unopposed
7
Texas 5
Earle Cabell
Democratic
1964
Re-elected
Earle Cabell (D) 61.0% Duke Burgess (R) 39.0%
8
Texas 6
Olin E. Teague
Democratic
1946
Re-elected
Olin E. Teague (D) Unopposed
9
Texas 8
Lera Millard Thomas
Democratic
1966
Retired Democratic hold
Robert C. Eckhardt (D) 92.3% W. D. Spayne (R) 7.7%
10
Texas 9
Jack Brooks Redistricted from 2nd
Democratic
1952
Re-elected
Jack Brooks (D) Unopposed
11
Texas 9
Clark W. Thompson
Democratic
1947
Retired Democratic loss
Jack Brooks (D) Unopposed
12
Texas 12
Jim Wright
Democratic
1954
Re-elected
Jim Wright (D) Unopposed
13
Texas 14
John Andrew Young
Democratic
1956
Re-elected
John Andrew Young (D) Unopposed
14
Texas 15
Kika de la Garza
Democratic
1964
Re-elected
Kika de la Garza (D) Unopposed
15
Texas 16
Richard C. White
Democratic
1964
Re-elected
Richard C. White (D) Unopposed
16
Texas 17
Omar Burleson
Democratic
1946
Re-elected
Omar Burleson (D) Unopposed
17
Texas 18
Walter E. Rogers
Democratic
1950
Retired Republican gain
Bob Price (R) 59.5% Dee Miller (D) 40.5%
18
Texas 19
George H. Mahon
Democratic
1934
Re-elected
George H. Mahon (D) Unopposed
19
Texas 21
O. C. Fisher
Democratic
1942
Re-elected
O. C. Fisher (D) Unopposed

Questions and formulas:
Question: What was the district who had their first elected in 1966?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1=1966),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F19,D2:D19=1966),1))
Level: medium
Question: Who was the candidate when the incumbent was Richard C. White?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Richard C. White"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F19,B2:B19="Richard C. White"),6))
Level: medium