CREATE TABLE "schedule" (
  "date" text,
  "opponentnum" text,
  "rank_num" text,
  "site" text,
  "result" text,
  "attendance" text
);

Question: Who was the opponent when the attendance was 87,453?
SQL: SELECT "opponentnum" FROM "schedule" WHERE "attendance"='87,453';

Question: What was the attendance when they had a ranking of #4?
SQL: SELECT "attendance" FROM "schedule" WHERE "rank_num"='4';