Question: What is the name of the world's tallest building located in Dubai Marina?
Answer(s):
answer: Burj Khalifa

SPARQL query:
#MANUAL SPARQL
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
	?x ns:common.topic.notable_types ns:m.01xljq9 ; #skyskraper
	   ns:location.location.containedby ?c ;	#Dubai
           ns:architecture.structure.height_meters ?y
}
ORDER BY DESC(xsd:float(?y))
LIMIT 1