CREATE TABLE table_37451 ("Team" TEXT, "Driver" TEXT, "Laps" FLOAT, "Time" TEXT, "Grid" FLOAT)

What is the average grid of driver Christian Vietoris who has less than 12 laps?
SELECT AVG("Grid") FROM table_37451 WHERE "Driver" = 'christian vietoris' AND "Laps" < '12'
SELECT AVG("Grid") FROM "table_37451" WHERE "Driver" = 'christian vietoris' AND "Laps" < '12'