Below is an instruction that describes a task. Write a response that appropriately completes the request.

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

### Inputs:
table_name: table, columns: ['Round', 'Grand Prix', 'Date', 'Location', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Winning Constructor', 'Report']

### Response:
SELECT Report FROM table WHERE Winning Constructor = Williams - Renault AND Grand Prix = South African Grand Prix