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_1137704_2 (report VARCHAR, winning_constructor VARCHAR, grand_prix VARCHAR)

### Question ###
what are all the report where winning constructor is williams - renault and grand prix is south african grand prix

### Accurate SQL ###

SELECT report FROM table_1137704_2 WHERE winning_constructor = "Williams - Renault" AND grand_prix = "South African grand_prix"