Find the name and membership level of the visitors whose membership level is higher than 4, and sort by their age from old to young.
return visitors ;return membership  levels of  #1 ;return #1 where #2 is  higher than 4 ;return names of  #3 ;return membership  levels of  #3 ;return ages of  #3 ;return #4 ,  #5 ;return #7 sorted by #6 from  old to young
['select', 'project', 'comparative', 'project', 'project', 'project', 'union', 'sort']