Table:
0
A
B
C
D
E
1
District
Vacator
Reason for change
Successor
Date successor seated
2
New York 7th
Vacant
Rep. John J. Delaney died during previous congress
Louis B. Heller (D)
February 15, 1949
3
New York 20th
Sol Bloom (D)
Died March 7, 1949
Franklin Delano Roosevelt, Jr. (Lib)
May 17, 1949
4
New York 10th
Andrew L. Somers (D)
Died April 6, 1949
Edna F. Kelly (D)
November 8, 1949
5
Pennsylvania 26th
Robert L. Coffey (D)
Died April 20, 1949
John P. Saylor (R)
September 13, 1949
6
California 5th
Richard J. Welch (R)
Died September 10, 1949
John Shelley (D)
November 8, 1949
7
Massachusetts 6th
George J. Bates (R)
Died November 1, 1949
William H. Bates (R)
February 14, 1950
8
Illinois 5th
Martin Gorski (D)
Died December 4, 1949
Vacant
Not filled for the remainder of this term
9
Virginia 1st
S. Otis Bland (D)
Died February 16, 1950
Edward J. Robeson, Jr. (D)
May 2, 1950
10
Illinois 13th
Ralph E. Church (R)
Died March 21, 1950
Vacant
Not filled for the remainder of this term
11
Michigan 16th
John Lesinski, Sr. (D)
Died May 27, 1950
Vacant
Not filled for the remainder of this term
12
North Dakota At-large
William Lemke (R)
Died May 30, 1950
Vacant
Not filled for the remainder of this term
13
North Carolina 11th
Alfred L. Bulwinkle (D)
Died August 31, 1950
Woodrow W. Jones (D)
November 7, 1950

Questions and formulas:
Question: In district New York 10th, what was the reason for change?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="New York 10th"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E13,A2:A13="New York 10th"),3))
Level: medium