Table:
0
A
B
C
D
E
1
Semi-closed initial unstressed vowels
17th c.
American
Australian
Examples
2
a /ə/
ɐ
ə
ə
addendum, appendix, calliope, farrago
3
e /ɛ, ɨ/
ɛ
ɛ, ə
e, ə
ellipsis, Ecclesiastes, erratum
4
i /ɪ, ɨ/
ɪ
ɪ, ə
ɪ, ə
Illyria, cf. cirrhosis
5
y /ɨ/
ɪ
ɪ, ə
ɪ, ə
syllepsis
6
o /ə/
ɔ
ə
ə
collector, oppressor, opprobrium, possessor

Questions and formulas:
Question: What is the American sound that has a 17th century equivalent of ɪ, and a Semi-closed initial unstressed vowels of i /ɪ, ɨ/?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="ɪ")*(A1="i /ɪ, ɨ/")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,(B2:B6="ɪ")*(A2:A6="i /ɪ, ɨ/")),3))
Level: medium
Question: What is the American sound that has a 17th century equivalent of ɔ?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ɔ"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="ɔ"),3))
Level: medium
Question: What is the entry for the Australian sound that has an example of illyria, cf. cirrhosis?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="illyria, cf. cirrhosis"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,E2:E6="illyria, cf. cirrhosis"),4))
Level: medium
Question: For the 17th century entry of ɐ, what is Semi-closed initial unstressed vowels?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ɐ"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="ɐ"),1))
Level: medium
Question: What is the entry for the Australian sound that has a 17th century equivalent of ɐ?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="ɐ"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,B2:B6="ɐ"),4))
Level: medium
Question: What is the example for the American of ɪ, ə, and a Semi-closed initial unstressed vowels of y /ɨ/?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(C1="ɪ, ə")*(A1="y /ɨ/")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,(C2:C6="ɪ, ə")*(A2:A6="y /ɨ/")),5))
Level: medium