How many days after Smolensk fell to the Poles did Cavalier of Malta Bartłomiej Nowodworski insert a mine into a sewer canal?
return Smolensk fell to the  Poles ;return the  Cavalier of Malta Bartłomiej Nowodworski did insert a mine into a  sewer canal ;return when  was  #1 ;return when  was  #2 ;return difference of #3 and  #4 in  days
['select', 'select', 'project', 'project', 'arithmetic']