Table:
0
A
B
C
D
E
F
1
District
Incumbent
Party
First elected
Result
Candidates
2
Illinois 1
Charles Hayes
Democratic
1983
Re-elected
Charles Hayes (D) 96.0% Stephen J. Evans (R) 4.0%
3
Illinois 2
Gus Savage
Democratic
1980
Re-elected
Gus Savage (D) 82.7% William T. Hespel (R) 17.3%
4
Illinois 3
Marty Russo
Democratic
1974
Re-elected
Marty Russo (D) 62.2% Joseph J. McCarthy (R) 37.8%
5
Illinois 6
Henry Hyde
Republican
1974
Re-elected
Henry Hyde (R) 73.7% William J. Andrle (D) 26.3%
6
Illinois 7
Cardiss Collins
Democratic
1973
Re-elected
Cardiss Collins (D) Unopposed
7
Illinois 12
Phil Crane
Republican
1969
Re-elected
Phil Crane (R) 75.2% John A. Leonardi (D) 24.8%
8
Illinois 17
Lane Evans
Democratic
1982
Re-elected
Lane Evans (D) 64.9% William E. Stewart (R) 35.1%

Questions and formulas:
Question: To what party does Cardiss Collins belong?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Cardiss Collins"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F8,B2:B8="Cardiss Collins"),3))
Level: medium