query: #defaultView:Map
  SELECT ?item ?itemLabel (group_concat(distinct ?countryL ; separator = ", ") as ?countries) (SAMPLE(?coords) AS ?coords) WHERE {
    ?item wdt:P31/wdt:P279* wd:Q27345018 .
    ?item wdt:P625 ?coords .
    ?item wdt:P17 ?country .
    ?country rdfs:label ?countryL filter (lang(?countryL) = "en") .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" . }
  } 
  GROUP BY ?item ?itemLabel 
  ORDER BY ?countries 