On what type of surface did they play on 13 February 1994?
CREATE TABLE table_name_80 (surface VARCHAR, date VARCHAR)
SELECT surface FROM table_name_80 WHERE date = "13 february 1994"
### Context: CREATE TABLE table_name_80 (surface VARCHAR, date VARCHAR) ### Question: On what type of surface did they play on 13 February 1994? ### Answer: SELECT surface FROM table_name_80 WHERE date = "13 february 1994"