Task: Question Generation
Input (English): #1 return flights 
#2 return #1 on us air 
#3 return #2 from toronto 
#4 return #3 to  salt lake city 
#5 return #4 on monday may thirty first 
#6 return is  there any  #5
Output (English): does us air have a flight from toronto to salt lake city monday may thirty first