Table:
0
A
B
C
D
E
1
↓ Function / Genus →
Shigella
Salmonella
Yersinia
Escherichia
2
Needle monomer
MxiH
PrgI
YscF
EscF
3
Inner rod
MxiI
PrgJ
YscI
EscI
4
Needle-tip protein
IpaD
SipD
LcrV
EspA
5
Translocator
IpaB
SipB
YopB
EspD
6
Translocator
IpaC
SipC
YopD
EspB
7
Chaperone for the two translocators
IpgC
SicA
SycD
CesD
8
ATPase
Spa47
InvC
YscN
SepB (EscN)
9
Ruler protein
Spa32
InvJ
YscP
Orf16
10
Switch
Spa40
SpaS
YscU
EscU

Questions and formulas:
Question:  how many ↓ function / genus → with escherichia being espd
Formula: ROWS(UNIQUE(FILTER(A1, E1="EspD")))
Formula2: ROWS(UNIQUE(FILTER(A2:A10, E2:E10="EspD")))
Level: medium
Question: what's the salmonella with escherichia being espd
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="EspD"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,E2:E10="EspD"),3))
Level: medium
Question: what's the ↓ function / genus → with shigella being spa32
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="Spa32"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,B2:B10="Spa32"),1))
Level: medium
Question: what's the salmonella with shigella being ipgc
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="IpgC"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,B2:B10="IpgC"),3))
Level: medium
Question: what's the salmonella with escherichia being sepb (escn)
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="SepB (EscN)"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,E2:E10="SepB (EscN)"),3))
Level: medium
Question: what's the shigella with yersinia being yscp
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="YscP"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,D2:D10="YscP"),2))
Level: medium