What nationality has a position of left wing, and a round greater than 4, with mattia baldi as the player?
CREATE TABLE "draft_picks" (
  "round" real,
  "player" text,
  "position" text,
  "nationality" text,
  "college_junior_club_team" text
);
SELECT "nationality" FROM "draft_picks" WHERE "position"='left wing' AND "round">4 AND "player"='mattia baldi';