query: PREFIX wd: <http://www.wikidata.org/entity/>
  PREFIX wdt: <http://www.wikidata.org/prop/direct/>
  PREFIX p: <http://www.wikidata.org/prop/>
  #by Jura1, 2015-02-07
  
  SELECT * 
  WHERE 
  {
    {SELECT 	
  		("as" as ?what1)     
  		(COUNT(DISTINCT(?item)) as ?number_of_items_with_property)
  		(COUNT(?value) 			as ?number_of_statements)
  WHERE	
  		{
            	?item p:P2421 ?value . 
          }				
  }
  UNION
    {SELECT 	
  		("bes" as ?what1)     
  		(COUNT(DISTINCT(?item)) as ?number_of_items_with_property)
  		(COUNT(?value) 			as ?number_of_statements)
  WHERE	
  		{
            	?item wdt:P2421 ?value . 
          }				
  }
    
  }
  
  