CREATE TABLE "schedule" (
  "week" real,
  "date" text,
  "opponent" text,
  "location" text,
  "time_et" text,
  "tv" text,
  "result" text,
  "record" text
);

Question: Who was the opposing team played at Riverfront Stadium?
SQL: SELECT "opponent" FROM "schedule" WHERE "location"='Riverfront Stadium';

Question: How many days were the Kansas City Chiefs the opposing team?
SQL: SELECT COUNT("date") FROM "schedule" WHERE "opponent"='Kansas City Chiefs';