On what tra k was the march 19 race held? 
CREATE TABLE table_2454550_1 (track VARCHAR, date VARCHAR)
SELECT track FROM table_2454550_1 WHERE date = "March 19"
### Context: CREATE TABLE table_2454550_1 (track VARCHAR, date VARCHAR) ### Question: On what tra k was the march 19 race held?  ### Answer: SELECT track FROM table_2454550_1 WHERE date = "March 19"