Table:
0
A
B
C
D
E
F
1
Rank
Artist
Album
Peak position
Sales
Certification
2
1
Nickelback
Dark Horse
1
480,000
6x Platinum
3
2
Simple Plan
Simple Plan
2
200,000
Platinum
4
3
Celine Dion
My Love: Essential Collection
2
160,000
2x Platinum
5
4
The Canadian Tenors
The Canadian Tenors
22
80,000
Platinum
6
5
City and Colour
Bring Me Your Love
3
80,000
Platinum
7
6
Cœur de pirate
Cœur de pirate
N/A
80,000
Platinum
8
7
Sarah McLachlan
Closer: The Best of Sarah McLachlan
3
80,000
Platinum
9
8
Theory of a Deadman
Scars & Souvenirs
2
80,000
Platinum
10
9
Sam Roberts
Love at the End of the World
1
50,000
Gold
11
10
Tara Oram
Chasing the Sun
8
50,000
Gold

Questions and formulas:
Question: What was the album Closer: The Best of Sarah Mclachlan certified as?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="closer: the best of sarah mclachlan"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F11,C2:C11="closer: the best of sarah mclachlan"),6))
Level: medium