query: SELECT 
   	(wd:Q2481549 as ?item) 
   	("most frequently linked" as ?legend) 
   	(GROUP_CONCAT(?group;separator = ",") as ?labels) 
   	(GROUP_CONCAT(?count;separator = ",") as ?values)
  WHERE
  {
   	{ SELECT * { SELECT ?group (COUNT(DISTINCT ?p) as ?count)
  {
      hint:Query hint:optimizer "None".
      ?p wdt:P1343 wd:Q665807 .
      [] schema:about ?p ; schema:isPartOf ?ws . 
      ?wp wdt:P856 ?ws ; wdt:P1800 ?group .
      ?p wdt:P31 wd:Q5 .
  }
  GROUP BY ?group
  ORDER BY DESC(?count)
  LIMIT 15            
  	} ORDER BY DESC(?count) }
  }