How many more people were staying at the convent in 1763 compared to 1917?
return the  convent ;return people staying at #1 ;return #2 in  1763 ;return #2 in  1917 ;return number of  #3 ;return number of  #4 ;return difference of #5 and  #6
['select', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']