How many months after a group of Khalkha nobles persuaded the Jebtsundamba Khutuktu that Mongolia must declare its independence from the Qing dynasty did a revolution break out in China?
return a group of Khalkha nobles persuaded the  Jebtsundamba Khutuktu that Mongolia must declare its independence from  the Qing dynasty ;return a revolution breaks out in  China ;return month of #1 ;return month of #2 ;return the  difference of #4 and  #3
['select', 'select', 'project', 'project', 'arithmetic']