How many grids have a time of +1:21.239 and more than 25 laps?
CREATE TABLE "250cc_classification" (
  "rider" text,
  "manufacturer" text,
  "laps" real,
  "time_retired" text,
  "grid" real
);
SELECT COUNT("grid") FROM "250cc_classification" WHERE "time_retired"='+1:21.239' AND "laps">25;