Task: Question Generation
Input (English): #1 return flights 
#2 return #1 from  montreal 
#3 return #2 to washington 
#4 return #3 that  leaves on  saturday 
#5 return fares of #4 
#6 return #4 where #5 is  lowest
Output (English): list flights from montreal to washington with the lowest one way fares that leaves on saturday