Table:
0
A
B
C
D
E
F
1
Position
Name
Stationed In
Appointed
Nominated by
Position Prior to Appointment
2
Justice
Jean E.L. Côté
Edmonton
1987
Mulroney
Lawyer at Reynolds, Mirth & Cote
3
Justice
Carole M. Conrad
Calgary
1992
Mulroney
Court of Queen's Bench of Alberta
4
Justice
Ellen I. Picard
Edmonton
1995
Chretien
Court of Queen's Bench of Alberta
5
Justice
Constance D. Hunt ( Supernumerary )
Calgary
1995
Chretien
Court of Queen's Bench of Alberta
6
Justice
Ronald L. Berger
Edmonton
1996
Chretien
Court of Queen's Bench of Alberta
7
Justice
Peter T. Costigan
Edmonton
1999
Chretien
Court of Queen's Bench of Alberta
8
Justice
Marina S. Paperny
Calgary
2001
Chretien
Court of Queen's Bench of Alberta
9
Justice
Keith G. Ritter ( Supernumerary )
Edmonton
2002
Chretien
Court of Queen's Bench of Alberta
10
Justice
Clifton D. O'Brien
Calgary
2005
Martin
Lawyer at Bennett Jones LLP
11
Justice
Peter W.L. Martin
Calgary
2005
Martin
Court of Queen's Bench of Alberta
12
Justice
Frans F. Slatter
Edmonton
2006
Harper
Court of Queen's Bench of Alberta
13
Justice
Jack Watson
Edmonton
2006
Harper
Court of Queen's Bench of Alberta
14
Justice
Patricia A. Rowbotham
Calgary
2007
Harper
Court of Queen's Bench of Alberta
15
Justice
J. D. Bruce McDonald
Calgary
2006
Harper
Court of Queen's Bench of Alberta
16
Justice
Myra B. Bielby
Edmonton
2010
Harper
Court of Queen's Bench of Alberta
17
Justice
Brian K. O'Ferrall
Calgary
2011
Harper
Provincial Court of Alberta

Questions and formulas:
Question: When was jack watson appointed?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,B1="Jack Watson"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F17,B2:B17="Jack Watson"),4))
Level: medium