query: SELECT ?entity ?entityLabel ?entityDescription 
  WHERE
  {
    ?entity p:P39 [ ps:P39 [ wdt:P279 wd:Q16707842 ] ] . 
    MINUS { ?entity wdt:P39 ?grouping . wd:Q16707842 ^wdt:P279 []; p:P39 [ ps:P39 [ wdt:P279 wd:Q16707842 ] ]  } 
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" }
  }
  LIMIT 1000