What week was the game played at Robert f. Kennedy memorial stadium with more than 54,633 people in attendance?
CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "game_site" text,
  "attendance" real
);
SELECT COUNT("week") FROM "schedule" WHERE "game_site"='robert f. kennedy memorial stadium' AND "attendance">'54,633';