What week did the Jets play in the meadowlands with and attendance of 78,161?
CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "game_site" text,
  "attendance" text
);
SELECT SUM("week") FROM "schedule" WHERE "game_site"='the meadowlands' AND "attendance"='78,161';