Table:
0
A
B
C
D
E
1
Province
Population
Region
Name of City
Districts
2
Lima
7605742
Lima
Lima
43
3
Constitutional Province of Callao
876877
Callao
Callao
6
4
Arequipa
864250
Arequipa
Arequipa
29
5
Trujillo
811979
La Libertad
Trujillo
11
6
Chiclayo
757452
Lambayeque
Chiclayo
20
7
Piura
665991
Piura
Piura
9
8
Maynas
492992
Loreto
Iquitos
13
9
Huancayo
466436
Junín
Huancayo
28
10
Santa
396434
Ancash
Chimbote
9
11
Cusco
367791
Cusco
Cusco
8
12
Coronel Portillo
333890
Ucayali
Pucallpa
7
13
Ica
321332
Ica
Ica
14
14
Cajamarca
316152
Cajamarca
Cajamarca
12
15
Sullana
287680
Piura
Sullana
8
16
Huánuco
270233
Huánuco
Huánuco
11
17
Tacna
262731
Tacna
Tacna
10
18
Lambayeque
258747
Lambayeque
Lambayeque
12
19
San Román
240776
Puno
Juliaca
4
20
Puno
229236
Puno
Puno
15

Questions and formulas:
Question: What is the region where Iquitos is located?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="Iquitos"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E20,D2:D20="Iquitos"),3))
Level: medium
Question: What is the region containing the Constitutional Province of Callao?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Constitutional Province of Callao"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E20,A2:A20="Constitutional Province of Callao"),3))
Level: medium