query: SELECT ?item (COUNT(?painting) AS ?count) (SAMPLE(?painting) AS ?painting)  WHERE {
    ?painting wdt:P31 wd:Q3305213 .
    ?painting wdt:P276 ?item . 
    MINUS { ?item wdt:P131 [] } . 
    } GROUP BY ?item 
  ORDER BY DESC (?count)
  LIMIT 500