Find the name and location of the stadiums which some concerts happened in the years of both 2014 and 2015.
return stadiums ;return years concerts happened in #1 ;return #1 where #2 is  2014 ;return #1 where #2 is  2015 ;return #1 of  both #3 and  #4 ;return names of  #5 ;return locations of  #5 ;return #6 ,  #7
['select', 'project', 'comparative', 'comparative', 'intersection', 'project', 'project', 'union']