Task: Question Decomposition
Input (English): question: How many months after a revolution broke out in China did Outer Mongolia declare independence?
Output (English): #1 return a revolution broke out in  China 
#2 return Outer Mongolia did declare independence 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return difference of #4 and  #3 in  months