Task: Question Generation
Input (English): #1 return airports 
#2 return passengers of  #1 
#3 return #2 where  #1 is London Heathrow 
#4 return #3 that  are  international 
#5 return number of  #4 
#6 return #3 that  are  domestic 
#7 return number of  #6 
#8 return sum of  #5 and #6
Output (English): How many international and domestic passengers are there in the airport London Heathrow?