Table:
0
A
B
C
D
E
1
Region
Date
Label
Format
Catalog
2
Japan
20 June 2001
Arista
CD
BVCA-21087
3
Europe
25 June 2001
Arista
CD
74321 86632 2
4
United Kingdom
25 June 2001
Arista
CD
74321 86346 2
5
United Kingdom
2 June 2003
Arista
Remastered CD
82876 54377 2
6
Europe
2 August 2004
Arista
Remastered CD
82876 54377 2

Questions and formulas:
Question: What is the Catalog with a Region that is europe?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="europe"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="europe"),5))
Level: medium