Show the countries that have both managers of age above 50 and managers of age below 46.
return managers  ;return ages of #1 ;return #1 where #2 is  above 50 ;return #1 where #2 is  below 46 ;return the  countries of #3 ;return the  countries of #4 ;return the  countries in both #5 and #6
['select', 'project', 'comparative', 'comparative', 'project', 'project', 'intersection']