query: SELECT DISTINCT ?item (COUNT(?collectie) AS ?collectieCount)
  WHERE 
  {
    ?item wdt:P31 wd:Q5.
    ?item wdt:P166 wd:Q1316544.
    ?item wdt:P6379 ?collectie.
    FILTER NOT EXISTS {
    ?item wdt:P7763 [].
    }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  
  GROUP BY ?item
  HAVING (?collectieCount > 1)
  ORDER BY DESC (?collectieCount)