When was the last time, since December 14, 1986, that the attendance was lower than 47,096?
CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "result" text,
  "attendance" real
);
SELECT MAX("week") FROM "schedule" WHERE "date"='december 14, 1986' AND "attendance"<'47,096';