Task: Question Generation
Input (English): #1 return flights 
#2 return connecting of #1 
#3 return #2 from  dallas  fort  worth 
#4 return #3 to san francisco 
#5 return #4 that  departs dallas  fort  worth at 1940 
#6 return itinerary of #5
Output (English): show me the itinerary for the connecting flight from dallas fort worth to san francisco that departs dallas fort worth at 1940