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_93 (surface VARCHAR, date VARCHAR)
### Question:
What type of surface was used for the game played on September 20, 1993?
### Answer:
SELECT surface FROM table_name_93 WHERE date = "september 20, 1993"