code: def date_created(self):
          
          date_created = self.xml.find('institution-profile/date-created')
          if date_created is not None:
              date_created = (int(date_created.attrib['year']),
                              int(date_created.attrib['month']),
                              int(date_created.attrib['day']))
          else:
              date_created = (None, None, None)
          return date_created
docs: Date the Scopus record was created.