Table:
0
A
B
C
D
E
1
District
Incumbent
Party
First elected
Results
2
Colorado 1
Diana DeGette
Democratic
1996
Re-elected
3
Colorado 2
Mark Udall
Democratic
1998
Re-elected
4
Colorado 3
John Salazar
Democratic
2004
Re-elected
5
Colorado 4
Marilyn Musgrave
Republican
2002
Re-elected
6
Colorado 5
Joel Hefley
Republican
1986
Retired Republican hold
7
Colorado 6
Tom Tancredo
Republican
1998
Re-elected
8
Colorado 7
Bob Beauprez
Republican
2002
Retired to run for Governor Democratic gain

Questions and formulas:
Question: Who is the incumbent for the Colorado 4 district?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="colorado 4"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,A2:A8="colorado 4"),2))
Level: medium
Question: What district is the incumbent Republican and the incumbent retired to run for governor democratic gain?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="republican")*(E1="retired to run for governor democratic gain")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(C2:C8="republican")*(E2:E8="retired to run for governor democratic gain")),1))
Level: medium
Question: In Colorado 6 district what is the party?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="colorado 6"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,A2:A8="colorado 6"),3))
Level: medium