Table:
0
A
B
C
D
E
1
Location
Aircraft
Tail number
Aircraft damage
Fatalities
2
Quelimane
Lockheed L-14
CR-AAV
W/O
Unknown
3
Lagoa Páti
Ju-52
Unknown
W/O
Unknown
4
Lourenço Marques
F27-200
CR-AIB
W/O
3/3
5
Quelimane
Boeing 737-200
C9-BAB
W/O
0/110
6
Lichinga
Boeing 737-200
C9-BAD
W/O
0/108
7
Off Maputo
Boeing 747SP
ZS-SPF
W/O
0/66

Questions and formulas:
Question: In what location were the fatalities unknown for the Ju-52 aircraft?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(E1="unknown")*(B1="ju-52")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(E2:E7="unknown")*(B2:B7="ju-52")),1))
Level: medium
Question: In what location was the tail number ZS-SPF?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="zs-spf"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,C2:C7="zs-spf"),1))
Level: medium
Question: What was the location of the Ju-52 aircraft?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ju-52"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="ju-52"),1))
Level: medium
Question: How many fatalities occurred for an unknown tail number?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="unknown"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,C2:C7="unknown"),5))
Level: medium
Question: What was the tail number with 3/3 fatalities?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="3/3"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,E2:E7="3/3"),3))
Level: medium
Question: How many fatalities occurred for the Ju-52 aircraft?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ju-52"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="ju-52"),5))
Level: medium