query: #Number of entities that use archivesAt
  #counted by repository, written by @erussey
  #illustrates bubblechart view, count
  #defaultView:BubbleChart
  SELECT ?archives_atLabel (COUNT(?items) AS ?count) WHERE {
    ?items wdt:P485 ?archives_at.
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  GROUP BY ?archives_atLabel