query: PREFIX wikibase: <http://wikiba.se/ontology#>
  PREFIX wd: <http://www.wikidata.org/entity/> 
  PREFIX wdt: <http://www.wikidata.org/prop/direct/>
  PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
  #Find seasons with missing series property (P179) (step 2)
  #by Jura1 Dec 31, 2015
  
  SELECT ?season ?seasonLabel ?series ?partof
  WHERE 
  {
      ?season wdt:P31 wd:Q3464665 
      OPTIONAL {?season wdt:P179 ?series} . FILTER(!BOUND(?series))
      OPTIONAL {?season wdt:P361 ?partof}
    
    	SERVICE wikibase:label {
      	bd:serviceParam wikibase:language "en,fr,es,it,nl,de,pl,ru" .
      	?season rdfs:label ?seasonLabel .
    	}
  }
  ORDER BY ?seasonLabel