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
Jeff Busby
Democratic
1922
Re-elected
Jeff Busby (D) Unopposed
6
Mississippi 5
Ross A. Collins
Democratic
1920
Re-elected
Ross A. Collins (D) Unopposed
7
Mississippi 6
Robert S. Hall
Democratic
1928
Re-elected
Robert S. Hall (D) Unopposed
8
Mississippi 7
Percy E. Quin
Democratic
1912
Re-elected
Percy E. Quin (D) Unopposed

Questions and formulas:
Question: How many winners were there in the race of 1922
Formula: ROWS(UNIQUE(FILTER(B1, D1=1922)))
Formula2: ROWS(UNIQUE(FILTER(B2:B8, D2:D8=1922)))
Level: medium