How many years after the Polish king was expelled did Lacy's corps take the fortress of Çufut Qale?
return the  Polish king was  expelled ;return Lacy 's corps take the  fortress of Çufut Qale ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']