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

### Instruction:
If the country of Origin is South Africa, who is the primary user?

### Inputs:
table_name: table, columns: ['Name / designation', 'Year of introduction', 'Country of origin', 'Primary cartridge', 'primary user']

### Response:
SELECT primary user FROM table WHERE Country of origin = South Africa