query: SELECT ?item ?ws (COUNT(DISTINCT ?p) as ?count) (SAMPLE(?p) as ?sampleitem)
  {
      hint:Query hint:optimizer "None".
      ?p wdt:P1343 wd:Q16055052 .
      ?url schema:about ?p ; schema:isPartOf ?ws . 
      ?item wdt:P856 ?ws ; wdt:P1800 ?group .
      ?p wdt:P31 wd:Q5 .
  }
  GROUP BY ?item ?ws
  ORDER BY DESC(?count)