What event was in detroit?
CREATE TABLE table_1139087_2 (grand_prix VARCHAR, location VARCHAR)
SELECT grand_prix FROM table_1139087_2 WHERE location = "Detroit"
### Context: CREATE TABLE table_1139087_2 (grand_prix VARCHAR, location VARCHAR) ### Question: What event was in detroit? ### Answer: SELECT grand_prix FROM table_1139087_2 WHERE location = "Detroit"