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_95 (winner VARCHAR, circuit VARCHAR, series VARCHAR)

### Question ###
What is Winner, when Circuit is Mallala Motor Sport Park, and when Series is ASTC Round 6?

### Accurate SQL ###

SELECT winner FROM table_name_95 WHERE circuit = "mallala motor sport park" AND series = "astc round 6"