query: #defaultView:BubbleChart
  SELECT ?placeLabel (COUNT(?place) AS ?count)
  WHERE
  {
  	?person wdt:P19 ?place.
    ?place wdt:P131+ wd:Q38.
      ?person wdt:P3987 ?ID_autore_SHARE_Catalogue
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "it". }
  }
  GROUP BY ?placeLabel
  ORDER BY DESC (?count)
  LIMIT 20