Who is the player from the United States in T4 place with a score of 68-73-68=209?
CREATE TABLE "third_round" (
  "place" text,
  "player" text,
  "country" text,
  "score" text,
  "to_par" text
);
SELECT "player" FROM "third_round" WHERE "country"='united states' AND "place"='t4' AND "score"='68-73-68=209';