Find the id and address of the shops whose score is below the average score.
return shops ;return scores of  #1 ;return average of  #2 ;return #1 where  #2 is  below #3 ;return ids of  #4 ;return addresses of  #4 ;return #5 ,   #6
['select', 'project', 'aggregate', 'comparative', 'project', 'project', 'union']