query: SELECT ?item ?delabel ?nr WHERE {
    ?item wdt:P31 wd:Q3464665 .
    ?item p:P179 ?series_statement.
    ?series_statement ps:P179 ?series.
    ?series_statement pq:P1545 ?nr.
    ?series rdfs:label ?delabel . FILTER(lang(?delabel) = "de")
    MINUS { ?item schema:description ?d FILTER (LANG (?d) = "de") .}
    
  }