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_name_23 (date VARCHAR, surface VARCHAR, score VARCHAR)
### Question:
What day was the surface clay and the score 6–1, 6–4?
### Answer:
SELECT date FROM table_name_23 WHERE surface = "clay" AND score = "6–1, 6–4"