query: SELECT ?item ?nr_s ?nr_e ?nr_es (CONCAT("[[",strafter(str(?season),"y/"),"\u007C",COALESCE(?nr_s,"?"),"]]") as ?s)
  (CONCAT("S",?nr_s,"&nbsp;E",?nr_e) as ?se) ?delabel
  WHERE 
  {  
    ?item wdt:P31/wdt:P279* wd:Q21191270 .
    ?item wdt:P179 wd:Q4525.   
    OPTIONAL { ?item rdfs:label ?delabel . FILTER(lang(?delabel)="de")  }  
    OPTIONAL { ?item wdt:P4908 ?season  OPTIONAL { ?season p:P179 [ pq:P1545 ?nr_s ] } }
    OPTIONAL { ?item p:P4908 [ pq:P1545 ?nr_e ] }
    OPTIONAL { ?item p:P179 [ pq:P1545 ?nr_es ] } 
  }
  ORDER BY xsd:integer(?nr_s) xsd:integer(?nr_e)