who is the person that plays left wing and is from canada that plays on the st. louis blues
CREATE TABLE "round_three" (
  "pick" real,
  "player" text,
  "position" text,
  "nationality" text,
  "nhl_team" text,
  "college_junior_club_team" text
);
SELECT "player" FROM "round_three" WHERE "position"='Left Wing' AND "nationality"='Canada' AND "nhl_team"='St. Louis Blues';