How many years after the War of Saint Sabas was settled did Genoa finally receive their quarter in Acre back?
return the  War of Saint Sabas was  settled ;return Genoa did finally receive their quarter in  Acre back ;return year of #1 ;return year of #2 ;return difference of #3 and  #4
['select', 'select', 'project', 'project', 'arithmetic']