What is the surface on 21 june 1993?
CREATE TABLE table_name_60 (surface VARCHAR, date VARCHAR)
SELECT surface FROM table_name_60 WHERE date = "21 june 1993"
### Context: CREATE TABLE table_name_60 (surface VARCHAR, date VARCHAR) ### Question: What is the surface on 21 june 1993? ### Answer: SELECT surface FROM table_name_60 WHERE date = "21 june 1993"