Which highest Overall has a Pick # of 4, and a Round larger than 7?
CREATE TABLE "indianapolis_colts_draft_history" (
  "round" real,
  "pick_num" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT MAX("overall") FROM "indianapolis_colts_draft_history" WHERE "pick_num"=4 AND "round">7;