Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_15 (initial_syllable_open_semi_open_unstressed_vowels VARCHAR, australian VARCHAR)

### Question ###
What is Initial-Syllable Open/Semi-Open Unstresses Vowels, when Australian is "ə"?

### Accurate SQL ###

SELECT initial_syllable_open_semi_open_unstressed_vowels FROM table_name_15 WHERE australian = "ə"