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_21197135_1 (date VARCHAR, record VARCHAR)
### Question:
How many opponents were there when the record was 6-0?
### Answer:
SELECT date FROM table_21197135_1 WHERE record = "6-0"