Table:
0
A
B
C
D
E
1
Aircraft
Origin
Squadron
Display Aircraft
Dates
2
Sud Aviation Alouette III
France
Squadron 33
4
1976—1980
3
Sud Aviation Alouette III
France
Squadron 102
2
1982—1992
4
Sud Aviation Alouette III
France
Squadron 111
4
1993—1994
5
Sud Aviation Alouette III
France
Squadron 552
2
2004—2005
6
Sud Aviation Alouette III
France
Squadron 552
3
2006—present

Questions and formulas:
Question: What are the dates of squadron 33?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="squadron 33"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,C2:C6="squadron 33"),5))
Level: medium