Question: Give me all breeds of the German Shepherd dog.
SPARQL:
PREFIX dbp: <http://dbpedia.org/property/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?uri WHERE 
{
	?uri dbp:breed res:German_Shepherd_Dog .
	OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') }
}