Question: Which Greek goddesses dwelt on Mount Olympus?
SPARQL query:
PREFIX prop: <http://dbpedia.org/property/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX yago: <http://dbpedia.org/class/yago/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT DISTINCT ?uri ?string WHERE 
{
        ?uri rdf:type yago:GreekGoddesses .
	?uri prop:abode res:Mount_Olympus .
	OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') }
}