How many more Spanish troops were there in Flanders compared to Extremadura in the 1650s?
return Flanders ;return Extremadura ;return Spanish troops in  the  1650s of #1 ;return Spanish troops in  the  1650s of #2 ;return number of  #3 ;return number of  #4 ;return the  difference of #5 and  #6
['select', 'select', 'project', 'project', 'aggregate', 'aggregate', 'arithmetic']