What is the largest overall where the position was linebacker and the pick number was more than 9?
CREATE TABLE "atlanta_falcons_draft_history" (
  "round" real,
  "pick_num" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT MAX("overall") FROM "atlanta_falcons_draft_history" WHERE "position"='linebacker' AND "pick_num">9;