In Round 13, what was the Pick # of the Guard Position with an Overall greater than 23?
CREATE TABLE "indianapolis_colts_draft_history" (
  "round" real,
  "pick_num" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT "pick_num" FROM "indianapolis_colts_draft_history" WHERE "overall">23 AND "position"='guard' AND "round"=13;