query: SELECT ?item (SAMPLE(?holder) as ?sample) (COUNT(DISTINCT ?holder) as ?ct)
  {
    	?item wdt:P31 wd:Q1240901 . 
    	OPTIONAL { ?holder wdt:P2358 ?item } 
    	MINUS { ?item wdt:P31 wd:Q4167410 } 
    	MINUS { ?item wdt:P31 wd:Q101352 }
  }
  GROUP BY ?item