query: SELECT ?item ?itemLabel ?itemDescription WHERE {
    ?item wdt:P31 wd:Q5;
          wdt:P21/wdt:P279* wd:Q48270.
    # label can fall back to English
    SERVICE wikibase:label {
      bd:serviceParam wikibase:language "de,en".
      ?item rdfs:label ?itemLabel.
    }
    # description must be in German (and exist)
    ?item schema:description ?itemDescription.
    FILTER(LANG(?itemDescription) = "de")
  }