Table:
0
A
B
C
D
E
1
City
Country
IATA
ICAO
Airport
2
Benghazi
Libya
BEN
HLLB
Benina International Airport
3
Djerba
Tunisia
DJE
DTTJ
Djerba–Zarzis International Airport
4
Gabès
Tunisia
GAE
DTTG
Gabès – Matmata International Airport
5
Gafsa
Tunisia
GAF
DTTF
Gafsa – Ksar International Airport
6
Malta
Malta
MLA
LMML
Malta International Airport
7
Misrata
Libya
MRA
HLMS
Misrata Airport
8
Monastir
Tunisia
MIR
DTMB
Monastir Habib Bourguiba International Airport
9
Naples
Italy
NAP
LIRN
Naples International Airport
10
Palermo
Italy
PMO
LICJ
Falcone–Borsellino Airport
11
Sfax
Tunisia
SFA
DTTX
Sfax–Thyna International Airport
12
Tabarka
Tunisia
TBJ
DTKA
Tabarka-Ain Draham International Airport
13
Tozeur
Tunisia
TOE
DTTZ
Tozeur–Nefta International Airport
14
Tripoli
Libya
TIP
HLLT
Tripoli International Airport
15
Tunis
Tunisia
TUN
DTAA
Tunis-Carthage International Airport

Questions and formulas:
Question: What is the airport when the iata is tbj?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="tbj"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,C2:C15="tbj"),5))
Level: medium
Question: what is the iata for malta international airport?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="malta international airport"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,E2:E15="malta international airport"),3))
Level: medium
Question: what is the airport for the country tunisia with the icao dtaa?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="tunisia")*(D1="dtaa")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,(B2:B15="tunisia")*(D2:D15="dtaa")),5))
Level: medium
Question: what is the city when the country is libya and the iata is ben?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="libya")*(C1="ben")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,(B2:B15="libya")*(C2:C15="ben")),1))
Level: medium
Question: what is the country when the city is gafsa?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="gafsa"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="gafsa"),2))
Level: medium
Question: what is the iata when the city is tripoli?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="tripoli"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="tripoli"),3))
Level: medium