query: #Tractats per lloc
  #defaultView:BubbleChart
  SELECT ?lloc ?llocLabel (count(*) as ?count)
  WHERE {
      ?tractat wdt:P31*/wdt:P279* wd:Q131569 .
      ?tractat wdt:P131|wdt:P276 ?lloc .
    SERVICE wikibase:label {
      bd:serviceParam wikibase:language "ca,en,es,fr" .
    }
  }
  GROUP BY ?lloc ?llocLabel
  ORDER BY DESC(?count)