Which team was back-to-back champions first, Penguins or Detroit Red Wings?
return the  Penguins was  back-to-back champions ;return the  Detroit Red Wings was  back-to-back champions ;return when  was  #1 ;return when  was  #2 ;return which is the  lowest of #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']