How many more prisoners escaped from the Hazaribagh Central Jail than the Muzaffarpur jail?
return Hazaribagh Central Jail ;return prisoners that escaped #1 ;return Muzaffarpur Jail ;return prisoners that escaped #3 ;return number of  #2 ;return number of  #4 ;return difference of #5 and  #6
['select', 'project', 'select', 'project', 'aggregate', 'aggregate', 'arithmetic']