What is the surface for the riverhead raceway?
CREATE TABLE table_name_84 (surface VARCHAR, track VARCHAR)
SELECT surface FROM table_name_84 WHERE track = "riverhead raceway"
### Context: CREATE TABLE table_name_84 (surface VARCHAR, track VARCHAR) ### Question: What is the surface for the riverhead raceway? ### Answer: SELECT surface FROM table_name_84 WHERE track = "riverhead raceway"