query: # map of places with population 0 (zero)
  #defaultView:Map
  SELECT ?place ?placeLabel ?coordinates ?layer WHERE {
    ?place wdt:P1082 0.
    OPTIONAL { ?place wdt:P17 ?country. }
    OPTIONAL { ?place wdt:P625 ?coordinates. }
    SERVICE wikibase:label {
      bd:serviceParam wikibase:language "en".
      ?place rdfs:label ?placeLabel.
      ?country rdfs:label ?layer.
    }
  }