what is the city located on the north saskatchewan river which is alberta's capital?
return cities ;return north saskatchewan river ;return #1 that is located on #2 ;return alberta ;return capital of #4 ;return #1 that is #5 ;return #1 in  both  #3 and #6
['select', 'select', 'filter', 'select', 'project', 'filter', 'intersection']