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_1357052_6 ( distribution VARCHAR, rsbac VARCHAR )

### Question ###
what's the dbeingtribution with rsbac being unknown

### Accurate SQL ###

SELECT distribution FROM table_1357052_6 WHERE rsbac = "Unknown"