query: SELECT ?w ?f WHERE {
    ?l a ontolex:LexicalEntry ; dct:language wd:Q9056 ;
            ontolex:lexicalForm ?f .
      ?f ontolex:representation ?x .
    {
      SELECT ?w WHERE {
        ?l a ontolex:LexicalEntry ; dct:language wd:Q9056 ;
              ontolex:lexicalForm ?y .
        ?y ontolex:representation ?w .
        FILTER(NOT EXISTS{?y wdt:P5279 ?o})
      } LIMIT 1
    }
    FILTER (?x = ?w)
  }