How many was the difference beween Sobieski's force and the Turks and Tatars?
return Sobieski ;return the  force of #1 ;return size of #2 ;return the  Turks and  Tatars ;return the  force of #4 ;return size of #5 ;return the  difference of #6 and  #3
['select', 'project', 'project', 'select', 'project', 'project', 'arithmetic']