query: #title: Languages with categories available at Commons, but no item with audio file
  # Complex constraint from [[Property talk:P443]]
  # if applicable, add P443 to an item (e.g. place name pronunciation audio to an item for the place). Based on [[Property_talk:P7084#Use for pronunciation file categories (Commons)]]
  SELECT ?item ?comcat
  WHERE
  {
      ?item p:P7084 [ ps:P7084 ?r ; pq:P642 wd:Q184377 ]
      MINUS { ?a p:P443/pq:P407 ?item .
              FILTER NOT EXISTS { ?a wikibase:lemma [] }
              FILTER NOT EXISTS { ?a rdf:type <http://www.w3.org/ns/lemon/ontolex#Form> }
      }           
      [] schema:about ?r ; schema:isPartOf <https://commons.wikimedia.org/> ; schema:name ?com . 
      BIND(CONCAT("[[c:", ?com, "\u007C", strafter(?com, ":"), "]]" ) as ?comcat)   
  }
  ORDER BY ?comcat
  LIMIT 500