What is Player, when Country is "United States", and when Place is "6"?
CREATE TABLE "final_leaderboard" (
  "place" text,
  "player" text,
  "country" text,
  "score" text,
  "to_par" text,
  "money" real
);
SELECT "player" FROM "final_leaderboard" WHERE "country"='united states' AND "place"='6';