How many years after the Tsar selected Tagan-Rog as an appropriate site for the military fleet was Taganrog was founded there and became the first military base of the Russian Navy?
return the  Tsar selected Tagan-Rog as an appropriate site for the   military fleet ;return Taganrog was  founded in  Tagan-Rog and  became the  first military base of the   Russian Navy ;return year of #1 ;return year of #2 ;return difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']