query: #Map of public art in London
  #defaultView:Map
  SELECT DISTINCT ?item ?itemLabel ?image ?coor
  WHERE
  {
      ?item wdt:P136 wd:Q557141 .
      ?item wdt:P131 ?sub0 . ?sub0 (wdt:P131)* wd:Q23939248;
    
  	OPTIONAL { ?item wdt:P625 ?coor }
  	OPTIONAL { ?item wdt:P18 ?image }  
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "en"  } 
  }