What event happened first, Bremen refusing to pledge allegiance to Charles X, or Carl Gustaf Wrangel departing from Swedish Pomerania?
return Bremen refusing to pledge allegiance to  Charles X ;return Carl Gustaf Wrangel departing from  Swedish Pomerania ;return when  was  #1 ;return when  was  #2 ;return which is lowest of #3 ,  #4
['select', 'select', 'project', 'project', 'comparison']