What grid has 23 laps done by Josh Brookes?
CREATE TABLE "superbike_race_1_classification" (
  "rider" text,
  "bike" text,
  "laps" real,
  "time" text,
  "grid" real
);
SELECT "grid" FROM "superbike_race_1_classification" WHERE "laps"=23 AND "rider"='josh brookes';