Table:
0
A
B
C
D
E
1
Province
Formed date
Formed from
Dissolution date
Reason
2
Auckland
17 January 1853
New Ulster
1 November 1876
Provinces abolished
3
New Plymouth
17 January 1853
New Ulster
1 November 1876
Provinces abolished
4
Hawke's Bay
1 November 1858
Wellington
1 November 1876
Provinces abolished
5
Wellington
17 January 1853
New Munster
1 November 1876
Provinces abolished
6
Nelson
17 January 1853
New Munster
1 November 1876
Provinces abolished
7
Marlborough
1 November 1859
Nelson
1 November 1876
Provinces abolished
8
Westland
1 December 1873
Canterbury
1 November 1876
Provinces abolished
9
Canterbury
17 January 1853
New Munster
1 November 1876
Provinces abolished
10
Otago
17 January 1853
New Munster
1 November 1876
Provinces abolished

Questions and formulas:
Question: What province was New Plymouth formed from?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="New Plymouth"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,A2:A10="New Plymouth"),3))
Level: medium
Question: Why was Otago formed?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="Otago"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,A2:A10="Otago"),5))
Level: medium
Question: What provinces were formed from New Munster?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="New Munster"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,C2:C10="New Munster"),1))
Level: medium
Question: How many provinces are named Wellington?
Formula: ROWS(UNIQUE(FILTER(B1, A1="Wellington")))
Formula2: ROWS(UNIQUE(FILTER(B2:B10, A2:A10="Wellington")))
Level: medium
Question: What provinces were formed from New Munster?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="New Munster"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,C2:C10="New Munster"),1))
Level: medium