How many more houses were destroyed according to Georgi Khadziev compared to Barbara Jelavich?
return houses ;return #1 that were destroyed ;return #2 according to Georgi Khadziev ;return #2 according to Barbara Jelavich ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']