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_28884880_4 ( tournament_winner VARCHAR, conference VARCHAR )

### Question ###
Who was the tournament winner in the Southwestern Athletic Conference?

### Accurate SQL ###

SELECT tournament_winner FROM table_28884880_4 WHERE conference = "Southwestern Athletic conference"