What is the sum grid number when the driver was Luciano Burti?
CREATE TABLE table_name_55 (grid VARCHAR, driver VARCHAR)
SELECT COUNT(grid) FROM table_name_55 WHERE driver = "luciano burti"
### Context: CREATE TABLE table_name_55 (grid VARCHAR, driver VARCHAR) ### Question: What is the sum grid number when the driver was Luciano Burti? ### Answer: SELECT COUNT(grid) FROM table_name_55 WHERE driver = "luciano burti"