What round did Mitch Davis, with an overall higher than 118, have?
CREATE TABLE "atlanta_falcons_draft_history" (
  "round" real,
  "pick_num" real,
  "overall" real,
  "name" text,
  "position" text,
  "college" text
);
SELECT SUM("round") FROM "atlanta_falcons_draft_history" WHERE "name"='mitch davis' AND "overall"<118;