The game played 31 May 2010 was played on what surface?
CREATE TABLE table_name_98 (surface VARCHAR, date VARCHAR)
SELECT surface FROM table_name_98 WHERE date = "31 may 2010"
### Context: CREATE TABLE table_name_98 (surface VARCHAR, date VARCHAR) ### Question: The game played 31 May 2010 was played on what surface? ### Answer: SELECT surface FROM table_name_98 WHERE date = "31 may 2010"