Table:
0
A
B
C
D
E
1
City
Country
IATA
ICAO
Airport
2
Alexandria
Egypt
HBE
HEBA
Borg El Arab Airport [T]
3
Amman
Jordan
AMM
OJAI
Queen Alia International Airport [T]
4
Athens
Greece
ATH
LGAV
Athens International Airport [T]
5
Bahrain
Bahrain
BAH
OBBI
Bahrain International Airport [T]
6
Kuwait City
Kuwait
KWI
OKBK
Kuwait International Airport [Base]
7
Beirut
Lebanon
BEY
OLBA
Beirut Rafic Hariri International Airport
8
Cairo
Egypt
CAI
HECA
Cairo International Airport
9
Damascus
Syria
DAM
OSDI
Damascus International Airport [T]
10
Dubai
United Arab Emirates
DXB
OMDB
Dubai International Airport
11
Istanbul
Turkey
IST
LTBA
Istanbul Atatürk Airport
12
Jeddah
Saudi Arabia
JED
OEJN
King Abdul Aziz International Airport [T]
13
Rome
Italy
FCO
LIRF
Leonardo da Vinci-Fiumicino Airport [T]
14
Sharm el-Sheikh
Egypt
SSH
HESH
Sharm el-Sheikh International Airport
15
Vienna
Austria
VIE
LOWW
Vienna International Airport

Questions and formulas:
Question: What is IATA, when City is "Alexandria"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="alexandria"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,A2:A15="alexandria"),3))
Level: medium
Question: What is Airport, when Country is "Egypt", and when ICAO is "Heba"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="egypt")*(D1="heba")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,(B2:B15="egypt")*(D2:D15="heba")),5))
Level: medium
Question: What is City, when Country is "Kuwait"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="kuwait"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,B2:B15="kuwait"),1))
Level: medium
Question: What is IATA, when ICAO is "Hesh"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="hesh"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,D2:D15="hesh"),3))
Level: medium
Question: What is Country, when ICAO is "Hesh"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="hesh"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,D2:D15="hesh"),2))
Level: medium
Question: What is City, when IATA is "amm"?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="amm"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E15,C2:C15="amm"),1))
Level: medium