CREATE TABLE table_78664 ("Week" TEXT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Location" TEXT)

What was the result of the game against the Miami Dolphins held at the Riverfront Stadium?
SELECT "Result" FROM table_78664 WHERE "Location" = 'riverfront stadium' AND "Opponent" = 'miami dolphins'
SELECT "Result" FROM "table_78664" WHERE "Location" = 'riverfront stadium' AND "Opponent" = 'miami dolphins'