During the 1550's, how many more soldiers were estimated for Spain than France?
return Spain ;return France ;return estimated soldiers of #1 ;return estimated soldiers of #2 ;return #3 in  the  1550 's ;return #4 in  the  1550 's ;return number of  #5 ;return number of  #6 ;return the  difference of #7 and  #8
['select', 'select', 'project', 'project', 'filter', 'filter', 'aggregate', 'aggregate', 'arithmetic']