Table:
0
A
B
C
D
E
1
Date
City
Opponent
Results¹
Type of game
2
March 31
Bruxelles , Belgium
Belgium
1:0
Euro '64 Qualifying
3
June 19
Belgrade
Sweden
0:0
Euro '64 Qualifying
4
September 18
Malmö , Sweden
Sweden
2:3
Euro '64 Qualifying
5
October 6
Belgrade
Hungary
2:0
Friendly
6
October 27
Bucarest , Romania
Romania
1:2
Friendly
7
November 3
Zagreb
Czechoslovakia
2:0
Friendly

Questions and formulas:
Question: Who was the opposing team during the game in Zagreb?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="zagreb"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="zagreb"),3))
Level: medium