Question: Who painted The Storm on the Sea of Galilee?
SPARQL:
PREFIX dbp: <http://dbpedia.org/property/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT DISTINCT ?uri ?string WHERE
{
	res:The_Storm_on_the_Sea_of_Galilee dbp:artist ?uri .
	OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') }
}