query: SELECT ?item WHERE {
    ?item wdt:P1415 ?dummy0 .
    OPTIONAL {
      ?wiki0 <http://schema.org/about> ?item .
      FILTER(SUBSTR(STR(?wiki0),1,24) = 'https://en.wikipedia.org') .
    }
    FILTER(!bound(?wiki0))
    ?item wdt:P106 wd:Q13472585 .
    ?item wdt:P21 wd:Q6581072 .
  }