CREATE TABLE table_45131 ("Rider" CLOB, "Manufacturer" CLOB, "Laps" FLOAT, "Time/Retired" CLOB, "Grid" FLOAT)

What is the rider when the grid is 21?
SELECT "Rider" FROM table_45131 WHERE "Grid" = '21'
SELECT "Rider" FROM "table_45131" WHERE "Grid" = '21'