query: SELECT DISTINCT ?item ?disambig
  WHERE
  {
    ?item	wdt:P31 wd:Q101352 ;
          wdt:P31 ?nature ;
  		rdfs:label ?label .
    ?disambig wdt:P31 wd:Q4167410 ;
              wdt:P31 ?nature2 ;
              rdfs:label ?label .
    FILTER (lang(?label) = "de").
    FILTER NOT EXISTS { ?item wdt:P1889 ?disambig .}
    #SERVICE wikibase:label { bd:serviceParam wikibase:language "en" .}
  }GROUP BY ?item ?disambig
  HAVING((COUNT(?nature) = 1) && (COUNT(?nature2) = 1))
  LIMIT 5000