CREATE TABLE table_29483 ("Pos" FLOAT, "Grid" FLOAT, "Car" FLOAT, "Driver" TEXT, "Constructor" TEXT, "Manufacturer" TEXT, "Laps" FLOAT, "Laps Led" FLOAT, "Points" FLOAT)

How many constructors had a grid of 13?
SELECT COUNT("Constructor") FROM table_29483 WHERE "Grid" = '13'
SELECT COUNT("Constructor") FROM "table_29483" WHERE "Grid" = '13'