How many years after the Dutch returned to Brazil did the Portuguese continue to attack and prevent the Dutch from harvesting sugar?
return the  Dutch  returned to Brazil ;return the  Portuguese continue to attack and  prevent the   Dutch  from  harvesting sugar ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']