What is the Rider, when Grid is less than 16, when Manufacturer is Aprilia, and when Time is +28.288?
CREATE TABLE "250cc_classification" (
  "rider" text,
  "manufacturer" text,
  "laps" real,
  "time" text,
  "grid" real
);
SELECT "rider" FROM "250cc_classification" WHERE "grid"<16 AND "manufacturer"='aprilia' AND "time"='+28.288';