query: #title: Ordinal qualifier on series statement would generally be unique within series
  # Complex constraint from [[Property talk:P4908]]
  # define exceptions when needed
  SELECT ?item ?itemLabel ?series ?seriesLabel ?ordinal
  WITH
  {  SELECT ?series ?ordinal (COUNT(DISTINCT ?ep) as ?ct)
    {
  	?ep wdt:P4908 [] ; wdt:P31 wd:Q21191270; p:P179 [ps:P179 ?series ; pq:P1545 ?ordinal ]
    }
    GROUP BY ?series ?ordinal 
    HAVING ( ?ct > 1)
  } as %find
  WHERE
  {
    INCLUDE %find 
    ?item  p:P179 [ ps:P179 ?series  ; pq:P1545 ?ordinal ] ; wdt:P31 wd:Q21191270     
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en,it". }
  }
  ORDER BY ?series xsd:integer(?ordinal) ?item