Table:
0
A
B
C
D
E
1
District
Vacator
Reason for change
Successor
Date successor seated
2
Indiana Territory
Vacant
failure to elect
Jonathan Jennings
Seated November 27, 1809
3
Pennsylvania 1st
Benjamin Say (DR)
Resigned June, 1809
Adam Seybert (DR)
Seated October 10, 1809
4
Massachusetts 7th
William Baylies (F)
Lost contested election June 28, 1809
Charles Turner, Jr. (DR)
June 28, 1809
5
Virginia 21st
Wilson C. Nicholas (DR)
Resigned November 27, 1809
David S. Garland (DR)
Seated January 17, 1810
6
Maryland 7th
John Brown (DR)
Resigned sometime in 1810
Robert Wright (DR)
Seated November 29, 1810
7
Massachusetts 10th
Jabez Upham (F)
Resigned sometime in 1810
Joseph Allen (F)
October 8, 1810
8
New York 2nd
William Denning (DR)
Resigned sometime in 1810
Samuel L. Mitchill (DR)
December 4, 1810
9
Maryland 4th
Roger Nelson (DR)
Resigned May 14, 1810
Samuel Ringgold (DR)
Seated October 15, 1810
10
Massachusetts 11th
William Stedman (F)
Resigned July 16, 1810
Abijah Bigelow (F)
October 8, 1810
11
New Jersey At-large
James Cox (DR)
Died September 12, 1810
John A. Scudder (DR)
Seated October 31, 1810
12
Virginia 1st
John G. Jackson (DR)
Resigned September 28, 1810
William McKinley (DR)
Seated December 21, 1810

Questions and formulas:
Question: Name the reason for change for jonathan jennings
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="Jonathan Jennings"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,D2:D12="Jonathan Jennings"),3))
Level: medium
Question: Name the date successor seated for failure to elect
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="failure to elect"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,C2:C12="failure to elect"),5))
Level: medium