What is the lowest overall for a quarterback with fewer than 7 rounds?
CREATE TABLE "atlanta_falcons_draft_history" (
  "round" real,
  "pick_num" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT MIN("overall") FROM "atlanta_falcons_draft_history" WHERE "position"='quarterback' AND "round"<7;