How many rounds have an Overall larger than 17, and a Position of quarterback?
CREATE TABLE "1999_new_england_patriots_draft_selectio" (
  "round" real,
  "overall" real,
  "player" text,
  "position" text,
  "college" text
);
SELECT COUNT("round") FROM "1999_new_england_patriots_draft_selectio" WHERE "overall">17 AND "position"='quarterback';