query: SELECT ?item (SHA512(CONCAT(str(?item),str(RAND()))) as ?random) ?wade WHERE {
    ?item wdt:P136 wd:Q557141;
      wdt:P18 ?image.
    MINUS { ?item wdt:P180 ?depicts. }
    BIND(REPLACE(STR(?item), "http://www.wikidata.org/entity/", "", "i") AS ?itemId)
    BIND(CONCAT("[https://art.wikidata.link/item/", ?itemId, " add depiction info]") AS ?wade)
  }
  ORDER BY ?random
  LIMIT 50