Task: Question Generation
Input (English): #1 return flights 
#2 return #1 from los angeles 
#3 return #2 to  pittsburgh 
#4 return #3 that  are nonstop 
#5 return #4 which  arrive on monday 
#6 return #5 after 5pm
Output (English): list nonstop flights from los angeles to pittsburgh which arrive on monday after 5pm