Question: In which country is the Limerick Lake?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX res: <http://dbpedia.org/resource/>
SELECT DISTINCT ?uri ?string
WHERE
{ 
	res:Limerick_Lake onto:country ?uri .
	OPTIONAL { ?uri rdfs:label ?string . FILTER (lang(?string) = 'en') }
}