Table:
0
A
B
C
D
E
F
1
District
Incumbent
Party
First elected
Result
Candidates
2
Alabama 1
John McDuffie
Democratic
1918
Re-elected
John McDuffie (D) Unopposed
3
Alabama 2
J. Lister Hill
Democratic
1923
Re-elected
J. Lister Hill (D) Unopposed
4
Alabama 3
Henry B. Steagall
Democratic
1914
Re-elected
Henry B. Steagall (D) Unopposed
5
Alabama 4
Lamar Jeffers
Democratic
1921
Re-elected
Lamar Jeffers (D) 68.5% E. D. Banks (R) 31.5%
6
Alabama 5
Lafayette L. Patterson
Democratic
1928
Re-elected
Lafayette L. Patterson (D) Unopposed
7
Alabama 6
William B. Oliver
Democratic
1914
Re-elected
William B. Oliver (D) Unopposed

Questions and formulas:
Question: How many districts does william b. oliver represent?
Formula: ROWS(UNIQUE(FILTER(A1, B1="William B. Oliver")))
Formula2: ROWS(UNIQUE(FILTER(A2:A7, B2:B7="William B. Oliver")))
Level: medium
Question: What is the last year that someone is first elected?
Formula: UNIQUE(D1)
Formula2: UNIQUE(D2:D7)
Level: easy