What are the open and close dates of all the policies used by the customer who have "Diana" in part of their names?
return customers ;return names of  #1 ;return #1 where #2 has  Diana ;return policies used by #3 ;return open dates of  #4 ;return close dates of  #4 ;return #5 ,  #6
['select', 'project', 'comparative', 'project', 'project', 'project', 'union']