What type of surface did they play on 21 July 1997
CREATE TABLE table_name_14 (surface VARCHAR, date VARCHAR)
SELECT surface FROM table_name_14 WHERE date = "21 july 1997"
### Context: CREATE TABLE table_name_14 (surface VARCHAR, date VARCHAR) ### Question: What type of surface did they play on 21 July 1997 ### Answer: SELECT surface FROM table_name_14 WHERE date = "21 july 1997"