CREATE TABLE table_76576 ("Rider" TEXT, "Manufacturer" TEXT, "Laps" FLOAT, "Time" TEXT, "Grid" FLOAT)

Who had the lowest laps on a grid smaller than 16 with a time of +21.689?
SELECT MIN("Laps") FROM table_76576 WHERE "Grid" < '16' AND "Time" = '+21.689'
SELECT MIN("Laps") FROM "table_76576" WHERE "Grid" < '16' AND "Time" = '+21.689'