What is the average round of the s position player from the college of Mississippi and has an overall less than 214?
CREATE TABLE "washington_redskins_draft_history" (
  "round" real,
  "pick" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT AVG("round") FROM "washington_redskins_draft_history" WHERE "position"='s' AND "college"='mississippi' AND "overall"<214;