Which head coach led the Pittsburgh Steelers to victory in Super Bowl XIV?

In what year was Super Bowl XIII played? Which team did the Pittsburgh Steelers defeat in Super Bowl XIV? Who was named MVP of Super Bowl XIV? In which city was Super Bowl XIV played? In what year was Super Bowl XIV played? Which team did the Oakland Raiders defeat in Super Bowl XV? Jim Plunkett was named MVP of which Super Bowl? In which city was Super Bowl XV played?