Table:
0
A
B
C
D
E
F
1
Governor
State
Past
Party
Elected/assumed office
Seat up
2
Dan Malloy
Connecticut
List
Dem
2011
2014
3
Paul LePage
Maine
List
Rep
2011
2014
4
Deval Patrick
Massachusetts
List
Dem
2007
2014
5
Lincoln Chafee
Rhode Island
List
Ind
2011
2014
6
Maggie Hassan
New Hampshire
List
Dem
2013
2014
7
Chris Christie
New Jersey
List
Rep
2010
2013
8
Andrew Cuomo
New York
List
Dem
2011
2014
9
Peter Shumlin
Vermont
List
Dem
2011
2014

Questions and formulas:
Question: What state had an elected/assumed office in 2013?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,E1=2013),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F9,E2:E9=2013),2))
Level: medium