query: embed.html##defaultView:Tree
  SELECT ?continent ?continentFlag ?continentLabel ?country ?countryLabel ?countryFlag ?region ?regionLabel ?regionFlag ?city ?cityLabel ( 'Population:' as ?popLabel )  ?pop  ?cityImage WHERE {
    {
      SELECT * WHERE {
        ?continent wdt:P31 wd:Q5107.
        ?country wdt:P30 ?continent.
        ?country wdt:P31 wd:Q6256.
        ?country wdt:P150 ?region.
        OPTIONAL {
          ?continent wdt:P242 ?continentFlag.
          ?country wdt:P41 ?countryFlag.
          ?region wdt:P41 ?regionFlag.
        }
        OPTIONAL {
          ?region wdt:P36 ?city.
          ?city wdt:P31 wd:Q515.
          ?city wdt:P1082 ?pop.
          ?city wdt:P18 ?cityImage.
        }
      }
      
    }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
  }