Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Semi-closed initial unstressed vowels | 17th c. | American | Australian | Examples |
| --- | --- | --- | --- | --- |
| a /ə/ | ɐ | ə | ə | addendum, appendix, calliope, farrago |
| e /ɛ, ɨ/ | ɛ | ɛ, ə | e, ə | ellipsis, Ecclesiastes, erratum |
| i /ɪ, ɨ/ | ɪ | ɪ, ə | ɪ, ə | Illyria, cf. cirrhosis |
| y /ɨ/ | ɪ | ɪ, ə | ɪ, ə | syllepsis |
| o /ə/ | ɔ | ə | ə | collector, oppressor, opprobrium, possessor |
Question:
For the 17th century entry of ɐ, what is Semi-closed initial unstressed vowels?
Answer:
a /ə/