How many months after Nyaungyan sent a force to reclaim Mohnyin, Mogaung, and Bhamo did he declare himself king?
return Nyaungyan sent a force to reclaim Mohnyin ,  Mogaung and  Bhamo ;return height did declare himself king ;return when  was  #1 ;return when  was  #2 ;return difference of #3 and  #4 in  months
['select', 'select', 'project', 'project', 'arithmetic']