query: SELECT DISTINCT ?wst
  WHERE
  {
    ?item	wdt:P1433 wd:Q665807 .
    [] schema:about ?item ; schema:isPartOf <https://de.wikisource.org/>; schema:name ?wst .
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q9353932 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q1114135 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q89374120 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q89349829 }
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q89697681 }  
    FILTER NOT EXISTS { ?item wdt:P31 wd:Q90076236 }  
  }
  ORDER BY ?wst