Which themes have had corresponding exhibitions that have had attendance both below 100 and above 500?
return themes ;return exhibitions with #1 ;return attendances of  #2 ;return #1 where #3 is  lower than 100 ;return #1 where #3 is  higher than 500 ;return #1 of  both #4 and  #5
['select', 'project', 'project', 'comparative', 'comparative', 'intersection']