What date in a week later than 8 had an attendance of more than 57,893, and a Opponent of at atlanta falcons?
CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "attendance" real
);
SELECT "date" FROM "schedule" WHERE "week">8 AND "attendance">'57,893' AND "opponent"='at atlanta falcons';