query: SELECT ?item ?itemLabel WHERE {
      ?nl_article schema:about ?item .
      ?nl_article schema:isPartOf <https://nl.wikipedia.org/> .
    
      OPTIONAL {?item wdt:P31 ?type }
      OPTIONAL {?item wdt:P279 ?subclass }
      FILTER ( !BOUND(?type) && !BOUND(?subclass) )
    
    OPTIONAL {?item rdfs:label ?itemLabel FILTER (lang(?itemLabel) = "nl") }
    
    }
  LIMIT 100