Table:
0
A
B
C
D
E
1
Position
Name
Party
First elected
District
2
Chairman
Sharon Bulova
Democratic Party
2009
At-Large
3
Supervisor
John Cook
Republican Party
2009
Braddock
4
Supervisor
John Foust
Democratic Party
2007
Dranesville
5
Supervisor
Cathy Hudgins
Democratic Party
1999
Hunter Mill
6
Supervisor
Jeff McKay
Democratic Party
2007
Lee
7
Supervisor
Penelope Gross
Democratic Party
1995
Mason
8
Supervisor
Gerald Hyland
Democratic Party
1988
Mount Vernon
9
Supervisor
Linda Smyth
Democratic Party
2003
Providence
10
Supervisor
Pat Herrity
Republican Party
2007
Springfield
11
Supervisor
Michael Frey
Republican Party
1991
Sully

Questions and formulas:
Question: Tell me the name for first elected more than 1988 and district of mason
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1>1988)*(E1="mason")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,(D2:D11>1988)*(E2:E11="mason")),2))
Level: medium
Question: Name the party with first elected more than 1999 and position of supervisor for john foust
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1>1999)*(A1="supervisor")*(B1="john foust")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,(D2:D11>1999)*(A2:A11="supervisor")*(B2:B11="john foust")),3))
Level: medium
Question: Name the total number of first elected for dranesville
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="dranesville"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,E2:E11="dranesville"),4))
Level: medium