Table:
0
A
B
C
D
E
1
Name
Current version
System
Platform
License
2
dasShiny
git-c2ed70905e
Nintendo DS
Windows , OS X , GNU/Linux
GPL v3
3
DeSmuME
0.9.9
Nintendo DS
Windows , OS X , GNU/Linux , AmigaOS 4
GPL v2
4
DraStic
2.1.6.2a (Android) / 2.1.6.1p (Pandora)
Nintendo DS
Android , Pandora
Proprietary (available on inquiry)
5
Ensata
1.4e
Nintendo DS
Windows
Proprietary (official developers only)
6
iDeaS
1.0.4.0
Nintendo DS , Game Boy Advance
Windows , GNU/Linux
Proprietary
7
NO$GBA
2.7a
Nintendo DS , Game Boy Advance
Windows , DOS
Proprietary
8
nds4droid
42
Nintendo DS
Android
GPL v2
9
DuoS
1.0
Nintendo DS
Windows
Unknown

Questions and formulas:
Question: What platform is nds4droid on for the nintendo ds?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="nintendo ds")*(A1="nds4droid")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,(C2:C9="nintendo ds")*(A2:A9="nds4droid")),4))
Level: medium
Question: Who has a license of proprietary (available on inquiry)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="proprietary (available on inquiry)"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,E2:E9="proprietary (available on inquiry)"),1))
Level: medium
Question: What platform is nds4droid on for the nintendo ds with a license of gpl v2?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="nintendo ds")*(E1="gpl v2")*(A1="nds4droid")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,(C2:C9="nintendo ds")*(E2:E9="gpl v2")*(A2:A9="nds4droid")),4))
Level: medium
Question: What system has a current version of 1.4e?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="1.4e"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,B2:B9="1.4e"),3))
Level: medium
Question: Who has a licence of gpl v2 and a current version of 0.9.9?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(E1="gpl v2")*(B1="0.9.9")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E9,(E2:E9="gpl v2")*(B2:B9="0.9.9")),1))
Level: medium