If the country of Origin is South Africa, who is the primary user?
CREATE TABLE table_28656 (
    "Name / designation" text,
    "Year of introduction" text,
    "Country of origin" text,
    "Primary cartridge" text,
    "primary user" text
)
SELECT "primary user" FROM table_28656 WHERE "Country of origin" = 'South Africa'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: If the country of Origin is South Africa, who is the primary user? ### Input: CREATE TABLE table_28656 (
    "Name / designation" text,
    "Year of introduction" text,
    "Country of origin" text,
    "Primary cartridge" text,
    "primary user" text
) ### Response: SELECT "primary user" FROM table_28656 WHERE "Country of origin" = 'South Africa'