How many people difference is there between the highest and lowest number they say died in Ireland between 1641 and 1653?
return Ireland ;return people of #1 ;return #2 that they say died between 1641 and  1653 ;return number of  #3 ;return the  highest of #4 ;return the  lowest of #4 ;return the  difference of #5 and  #6
['select', 'project', 'filter', 'aggregate', 'aggregate', 'aggregate', 'arithmetic']