Which Grid that has a Rider of mike di meglio, and Laps larger than 23?
CREATE TABLE "125cc_classification" (
  "rider" text,
  "manufacturer" text,
  "laps" real,
  "time" text,
  "grid" real
);
SELECT AVG("grid") FROM "125cc_classification" WHERE "rider"='mike di meglio' AND "laps">23;