Table:
0
A
B
C
D
E
F
1
District
Incumbent
Party
First elected
Result
Candidates
2
Mississippi 1
John E. Rankin
Democratic
1920
Re-elected
John E. Rankin (D) Unopposed
3
Mississippi 2
Wall Doxey
Democratic
1928
Re-elected
Wall Doxey (D) Unopposed
4
Mississippi 3
William Madison Whittington
Democratic
1924
Re-elected
William Madison Whittington (D) Unopposed
5
Mississippi 4
Aaron L. Ford
Democratic
1934
Re-elected
Aaron L. Ford (D) Unopposed
6
Mississippi 5
Ross A. Collins
Democratic
1936
Re-elected
Ross A. Collins (D) Unopposed
7
Mississippi 6
William M. Colmer
Democratic
1932
Re-elected
William M. Colmer (D) Unopposed

Questions and formulas:
Question: what was the maxiumum for the first elected?
Formula: UNIQUE(D1)
Formula2: UNIQUE(D2:D7)
Level: easy