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_97 (surface VARCHAR, tournament VARCHAR, date VARCHAR)
### Question:
What type of surface was used for the carthage tournament on august 14, 1994?
### Answer:
SELECT surface FROM table_name_97 WHERE tournament = "carthage" AND date = "august 14, 1994"