CREATE TABLE table_1071 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Location" TEXT, "Time  (  ET  ) " TEXT, "TV" TEXT, "Result" TEXT, "Record" TEXT)

Who was the opposing team played at Riverfront Stadium?
SELECT "Opponent" FROM table_1071 WHERE "Location" = 'Riverfront Stadium'
SELECT "Opponent" FROM "table_1071" WHERE "Location" = 'Riverfront Stadium'