Task: Question Generation
Input (English): #1 return flights 
#2 return #1 from  oakland 
#3 return #2 to boston 
#4 return #3 on  usa air 
#5 return #4 leaving on  july twenty seventh 
#6 return #5 which  are nonstop 
#7 return the number of #6
Output (English): on usa air how many flights leaving oakland on july twenty seventh to boston nonstop