query: SELECT ?entity ?entityLabel ?entityDescription 
  WHERE
  {
    ?entity p:P39 ?officeStatement . ?officeStatement ps:P39 [wdt:P279 wd:Q39871607] . FILTER NOT EXISTS { ?officeStatement pq:P582 [] } . 
    MINUS { ?entity wdt:P21 []; p:P39 ?officeStatement . ?officeStatement ps:P39 [wdt:P279 wd:Q39871607] . FILTER NOT EXISTS { ?officeStatement pq:P582 [] }  } 
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" }
  }
  LIMIT 1000