query: SELECT ?count ?property ?propertyLabel ?samp WHERE {
    {
      SELECT (COUNT(?item) AS ?count) ?property (SAMPLE(?item) AS ?samp) WHERE {
         hint:Query hint:optimizer "None".
         ?org_class wdt:P279* wd:Q17149090.
         ?org wdt:P31? ?org_class .
         ?item ?prop ?org .
         ?item wdt:P106 ?role .
         ?role wdt:P279* wd:Q1250916 .
         ?property wikibase:directClaim ?prop .
      } GROUP BY ?property
    }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  ORDER BY DESC (?count)