CREATE TABLE table_50970 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the average number of laps with 16 grids?
SELECT AVG("Laps") FROM table_50970 WHERE "Grid" = '16'
SELECT AVG("Laps") FROM "table_50970" WHERE "Grid" = '16'