docs: def get_sponsored_special_coverages():
      """:returns: Django query for all active special coverages with active campaigns."""
      now = timezone.now()
      qs = SpecialCoverage.objects.filter(
          tunic_campaign_id__isnull=False,
      )
      return qs.filter(
          start_date__lte=now,
          end_date__gt=now
      ) | qs.filter(
          start_date__lte=now,
          end_date__isnull=True
      )