query: #Ki Hajar Dewantara: list of all documents
  SELECT ?item ?itemLabel ?instanceLabel
  WHERE 
  {
    ?item wdt:P5008 wd:Q66826871.
    ?item wdt:P31 ?instance
    FILTER NOT EXISTS{ ?item wdt:P31 wd:Q5 . }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en,nl". }
  }