CREATE TABLE table_name_33 (grid NUMBER, manufacturer VARCHAR2, rider VARCHAR2)

Count the Grid which has a Manufacturer of aprilia, and a Rider of bradley smith?
SELECT AVG(grid) FROM table_name_33 WHERE manufacturer = "aprilia" AND rider = "bradley smith"
SELECT AVG("grid") FROM "table_name_33" WHERE "aprilia" = "manufacturer" AND "bradley smith" = "rider"