Table:
0
A
B
C
D
E
F
1
District
Incumbent
Party
First elected
Result
Candidates
2
Illinois 1
Ralph H. Metcalfe
Democratic
1970
Re-elected
Ralph H. Metcalfe (D) 91.4% Louis Coggs (R) 8.6%
3
Illinois 4
Ed Derwinski
Republican
1958
Re-elected
Ed Derwinski (R) 70.5% C. F. 'Bob' Dore (D) 29.5%
4
Illinois 10
Abner J. Mikva Redistricted from the 2nd district
Democratic
1968
Lost re-election Republican gain
Samuel H. Young (R) 51.6% Abner J. Mikva (D) 48.4%
5
Illinois 11
Frank Annunzio Redistricted from the 7th district
Democratic
1964
Re-elected
Frank Annunzio (D) 53.3% John J. Hoellen (R) 46.7%
6
Illinois 11
Roman C. Pucinski
Democratic
1958
Retired to run for U.S. Senate Democratic loss
Frank Annunzio (D) 53.3% John J. Hoellen (R) 46.7%
7
Illinois 12
Phil Crane Redistricted from the 13th district
Republican
1969
Re-elected
Phil Crane (R) 74.2% Edwin L. Frank (D) 25.8%
8
Illinois 15
Cliffard D. Carlson
Republican
April 4, 1972 (Special)
Retired Republican loss
Leslie C. Arends (R) 57.2% Tim L. Hall (D) 42.8%
9
Illinois 19
Tom Railsback
Republican
1966
Re-elected
Tom Railsback (R) Unopposed
10
Illinois 20
Paul Findley
Republican
1960
Re-elected
Paul Findley (R) 68.8% Robert S. O'Shea (D) 31.2%

Questions and formulas:
Question: What party did the incumbent from the Illinois 12 district belong to? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="Illinois 12"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F10,A2:A10="Illinois 12"),3))
Level: medium
Question: Who was the democratic incumbent in the Illinois 11 district who was re-elected? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(C1="Democratic")*(E1="Re-elected")*(A1="Illinois 11")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F10,(C2:C10="Democratic")*(E2:E10="Re-elected")*(A2:A10="Illinois 11")),2))
Level: medium
Question: Which incumbent was first elected in 1964? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1=1964),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F10,D2:D10=1964),2))
Level: medium
Question: What party did the incumbent from the Illinois 1 district belong to? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="Illinois 1"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F10,A2:A10="Illinois 1"),3))
Level: medium