Show the nations that have both hosts older than 45 and hosts younger than 35.
return hosts  ;return #1 that  are older than  45 ;return #1 that  are younger than  35 ;return the  nations of #2 ;return the  nations of #3 ;return the  nations in both #4 and #5
['select', 'filter', 'filter', 'project', 'project', 'intersection']