How many years passed between the arrival of François Jarret and the death of his son at the hands of the Iroquis?
return the  arrival of   François Jarret ;return the  death of   the   son of François Jarret at the    hands of  the Iroquis ;return year of   #1 ;return year of   #2 ;return the  difference of   #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']