Where was the tournament that happened in 1987 on a clay surface?
CREATE TABLE table_name_18 (tournament VARCHAR, date VARCHAR, surface VARCHAR)
SELECT tournament FROM table_name_18 WHERE date = 1987 AND surface = "clay"
### Context: CREATE TABLE table_name_18 (tournament VARCHAR, date VARCHAR, surface VARCHAR) ### Question: Where was the tournament that happened in 1987 on a clay surface? ### Answer: SELECT tournament FROM table_name_18 WHERE date = 1987 AND surface = "clay"