Table:
0
A
B
C
D
E
1
Value
Color
Obverse
Reverse
First issued
2
2.000 ₲
Magenta
Adela and Celsa Speratti
School parade
2008
3
5.000 ₲
Orange
Carlos Antonio López
Palace of the Lopez
1962
4
10.000 ₲
Brown
Dr. José José Gaspar Rodríguez de Francia
May 15, 1811 scene
1962
5
20.000 ₲
Light blue
Paraguayan woman
Central Bank of Paraguay
2005
6
50.000 ₲
Beige
Agustín Pío Barrios
Guitar of Agustín Pío Barrios
1981
7
100.000 ₲
Green
Saint Roque González de Santa Cruz
Itaipú Dam
1998

Questions and formulas:
Question: When was Color of green first issued?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="green"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="green"),5))
Level: medium
Question: When was Color of green last issued?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="green"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="green"),5))
Level: medium
Question: What reverse has a color of green?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="green"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="green"),4))
Level: medium
Question: How much was a Reverse of guitar of agustín pío barrios before 1998?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(E1<1998)*(D1="guitar of agustín pío barrios")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,(E2:E7<1998)*(D2:D7="guitar of agustín pío barrios")),1))
Level: medium