Doug Williams was named MVP of which Super Bowl?

In which city was Super Bowl XXI played? Which head coach led the New York Giants to victory in Super Bowl XXI? In what year was Super Bowl XXI played? Which team did the Washington Redskins defeat in Super Bowl XXII? In which city was Super Bowl XXII played? Which head coach led the Washington Redskins to victory in Super Bowl XXII? In what year was Super Bowl XXII played? Which team did the San Francisco 49ers defeat in Super Bowl XXIII?