What is the smallest grid for Ayrton Senna?
CREATE TABLE table_name_21 (grid INTEGER, driver VARCHAR)
SELECT MIN(grid) FROM table_name_21 WHERE driver = "ayrton senna"
### Context: CREATE TABLE table_name_21 (grid INTEGER, driver VARCHAR) ### Question: What is the smallest grid for Ayrton Senna? ### Answer: SELECT MIN(grid) FROM table_name_21 WHERE driver = "ayrton senna"