Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_21907770_4 (date VARCHAR, versus VARCHAR)
### Question:
What are the dates where the versus team is South Africa?
### Answer:
SELECT date FROM table_21907770_4 WHERE versus = "South Africa"