How many original districts was Prince-Bishopric of Hildesheim left without?
return the  Prince-Bishopric of Hildesheim ;return the  original districts of #1 ;return #2 that are left ;return number of  #2 ;return number of  #3 ;return the  difference of #4 and  #5
['select', 'project', 'filter', 'aggregate', 'aggregate', 'arithmetic']