Task: Question Generation
Input (English): #1 return cities 
#2 return north saskatchewan river 
#3 return #1 that is located on #2 
#4 return alberta 
#5 return capital of #4 
#6 return #1 that is #5 
#7 return #1 in  both  #3 and #6
Output (English): what is the city located on the north saskatchewan river which is alberta's capital?