query: PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
  PREFIX schema: <http://schema.org/>
  
  SELECT DISTINCT ?item ?article WHERE {
    ?article rdf:type schema:Article.
    ?article schema:about ?item.
    ?article schema:inLanguage "ca".
    FILTER(NOT EXISTS {
      ?item schema:description ?description.
      FILTER((LANG(?description)) = "ca")
    })
  }
  LIMIT 100