How many days after the Ossetian peasants rose in rebellion did the fighting culminate in Tskhinvali?
return the  Ossetian peasants rose in  rebellion ;return the  fighting culminate in  Tskhinvali ;return when  was  #1 ;return when  was  #2 ;return difference of #4 and  #3 in  days
['select', 'select', 'project', 'project', 'arithmetic']