What is the final score when the visiting team is the Washington Redskins and the date is September 4?
CREATE TABLE "2008" (
  "date" text,
  "visiting_team" text,
  "final_score" text,
  "host_team" text,
  "stadium" text
);
SELECT "final_score" FROM "2008" WHERE "visiting_team"='washington redskins' AND "date"='september 4';