What is the average and maximum number of total passengers for train stations in London or Glasgow?
return train stations ;return #1 in London ;return #1 in Glasgow ;return #2 or  #3 ;return passengers of #4 ;return number of #5 ;return average of #6 ;return maximum of #6 ;return #7 , #8
['select', 'filter', 'filter', 'union', 'project', 'aggregate', 'aggregate', 'aggregate', 'union']