What is Surface, when Tournament is "Sunderland , United Kingdom"?
CREATE TABLE table_name_4 (surface VARCHAR, tournament VARCHAR)
SELECT surface FROM table_name_4 WHERE tournament = "sunderland , united kingdom"
### Context: CREATE TABLE table_name_4 (surface VARCHAR, tournament VARCHAR) ### Question: What is Surface, when Tournament is "Sunderland , United Kingdom"? ### Answer: SELECT surface FROM table_name_4 WHERE tournament = "sunderland , united kingdom"