How many years after the closure of the Naval Base and the Charleston Naval Shipyard was the Carnival Fantasy permanently stationed in Charleston?
return the  closure of the   Naval  Base and  the    Charleston  Naval Shipyard ;return the  Carnival Fantasy was  permanently stationed in  Charleston  ;return year of #1 ;return year of #2 ;return difference of #3 and  #4
['select', 'select', 'project', 'project', 'arithmetic']