Task: Question Generation
Input (English): #1 return the  siege began in  Ayutthaya 
#2 return the  city of Ayutthaya did fall 
#3 return when  was  #1 
#4 return when  was  #2 
#5 return difference of #4 and  #3 in  months
Output (English): How many months after the siege began in Ayutthaya did the city fall?