Table:
0
A
B
C
D
E
1
District
Incumbent
2008 Status
Democratic
Republican
2
1
Steve Chabot
Re-election
Steve Driehaus
Steve Chabot
3
2
Jean Schmidt
Re-election
Victoria Wulsin
Jean Schmidt
4
3
Mike Turner
Re-election
Jane Mitakides
Mike Turner
5
4
Jim Jordan
Re-election
Mike Carroll
Jim Jordan
6
5
Bob Latta
Re-election
George Mays
Bob Latta
7
6
Charlie Wilson
Re-election
Charlie Wilson
Richard Stobbs
8
7
David Hobson
Open
Sharen Neuhardt
Steve Austria
9
8
John Boehner
Re-election
Nicholas Von Stein
John Boehner
10
9
Marcy Kaptur
Re-election
Marcy Kaptur
Bradley Leavitt
11
10
Dennis Kucinich
Re-election
Dennis Kucinich
Jim Trakas
12
11
Marcia L. Fudge
Re-election
Marcia L. Fudge
Thomas Pekarek
13
12
Pat Tiberi
Re-election
David Robinson
Pat Tiberi
14
13
Betty Sutton
Re-election
Betty Sutton
David Potter
15
14
Steve LaTourette
Re-election
Bill O'Neill
Steve LaTourette
16
15
Deborah Pryce
Open
Mary Jo Kilroy
Steve Stivers
17
16
Ralph Regula
Open
John Boccieri
Kirk Schuring
18
17
Tim Ryan
Re-election
Tim Ryan
Duane Grassell
19
18
Zack Space
Re-election
Zack Space
Fred Dailey

Questions and formulas:
Question: How many districts featured the democrat nicholas von stein?
Formula: SUMIFS(A1,D1,"nicholas von stein")
Formula2: SUMIFS(A2:A19,D2:D19,"nicholas von stein")
Level: easy
Question: Which incumbent's democratic candidate was mike carroll?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="mike carroll"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E19,D2:D19="mike carroll"),2))
Level: medium