Table:
0
A
B
C
D
E
1
Number
Proto-Austronesian
Proto-Malayo-Polynesian
Proto-Oceanic
Proto-Polynesian
2
one
*esa, *isa
*esa, *isa
*sa-kai, *ta-sa, *tai, *kai
*taha
3
two
*duSa
*duha
*rua
*rua
4
three
*telu
*telu
*tolu
*tolu
5
four
*Sepat
*epat
*pat, *pati, *pani
*faa
6
five
*lima
*lima
*lima
*lima

Questions and formulas:
Question: Which Proto-Austronesian has a Proto-Oceanic of *lima?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="*lima"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,D2:D6="*lima"),2))
Level: medium
Question: Which Proto-Oceanic has a Proto-Polynesian of *lima?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="*lima"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,E2:E6="*lima"),4))
Level: medium
Question: Which Number has a Proto-Polynesian of *taha?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="*taha"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,E2:E6="*taha"),1))
Level: medium
Question: WHich Proto-Polynesian has a Number of five?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="five"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="five"),5))
Level: medium
Question: Which Proto-Polynesian has a Proto-Malayo-Polynesian of *telu?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="*telu"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,C2:C6="*telu"),5))
Level: medium
Question: Which  Proto-Oceanic has a Proto-Polynesian of *lima?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="*lima"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,E2:E6="*lima"),4))
Level: medium