How many years after the Genoese helped Andronikos IV overthrow John V did Venice restore the latter to the throne?
return the  Genoese helped Andronikos IV overthrow John V ;return Venice restore John V to the  throne ;return year of #1 ;return year of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']