Table:
0
A
B
C
D
E
1
Reserve
District
IUCN
Est.
Description
2
Aguacaliente
Toledo
IV
1998
Terrestrial.
3
Cockscomb Basin
Stann Creek / Toledo
IV
1997
Terrestrial.
4
Corozal Bay
Belize / Corozal
IV
1998
Marine.
5
Crooked Tree
Belize / Orange Walk
IV
1984
Ramsar site . Boundaries ill defined. Terrestrial.
6
Gales Point
Belize
IV
1998
Terrestrial.
7
Spanish Creek
Belize / Orange Walk
IV
2002
Terrestrial.
8
Swallow Caye
Belize
IV
2002
Marine.

Questions and formulas:
Question: What is the IUCN for the gales point reserve when the Est. is 1998?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1=1998)*(A1="gales point")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(D2:D8=1998)*(A2:A8="gales point")),3))
Level: medium
Question: What is the IUCN for the Cockscomb Basin reserve when the Est. is less than 1998?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1<1998)*(A1="cockscomb basin")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(D2:D8<1998)*(A2:A8="cockscomb basin")),3))
Level: medium