Question: Who created English Wikipedia?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT ?uri ?string
WHERE 
{
	?website rdf:type onto:Website .
        ?website onto:author ?uri .
        ?website rdfs:label 'English Wikipedia'@en .
        OPTIONAL {?uri rdfs:label ?string . FILTER (lang(?string) = 'en') }
}