docs: def _parse_relationship(self):
          """Nodes have Relationships, and similarly to properties,
          we set it as an attribute on the Organization so we can make calls like
              company.current_team
              person.degrees
          """
          rs_dict = self.data.get('relationships', {})
          for rs_name in self.KNOWN_RELATIONSHIPS:
              if rs_name in rs_dict:
                  setattr(
                      self, rs_name, Relationship(rs_name, rs_dict.get(rs_name)))
              else:
                  # fill in other relationships with None values
                  setattr(self, rs_name, NoneRelationshipSingleton)