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_15 (surface VARCHAR, date VARCHAR)
### Question:
On July 15, 1984 what surface was used?
### Answer:
SELECT surface FROM table_name_15 WHERE date = "july 15, 1984"