How many months after the Ukranian declaration of independence from Russia did Estonia issue their own declaration of independence?
return the  Ukranian declaration  of independence from  Russia ;return Estonia did issue their own declaration  of independence ;return when  was  #1 ;return when  was  #2 ;return difference of #4 and  #3 in  months
['select', 'select', 'project', 'project', 'arithmetic']