code: def is_sub_to_any(self, *super_entities):
          
          if super_entities:
              return self.filter(id__in=EntityRelationship.objects.filter(
                  super_entity__in=super_entities).values_list('sub_entity', flat=True))
          else:
              return self
docs: Given a list of super entities, return the entities that have super entities that interset with those provided.