John Riggins was named MVP of which Super Bowl?

In which city was Super Bowl XVI played? Which head coach led the San Francisco 49ers to victory in Super Bowl XVI? In what year was Super Bowl XVI played? Which team did the Washington Redskins defeat in Super Bowl XVII? In which city was Super Bowl XVII played? Which head coach led the Washington Redskins to victory in Super Bowl XVII? In what year was Super Bowl XVII played? Which team did the Los Angeles Raiders defeat in Super Bowl XVIII?