Question: Give me the official websites of actors of the television show Charmed.
SPARQL query:
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri
WHERE
{ 
	?film rdf:type onto:TelevisionShow .
        ?film rdfs:label 'Charmed'@en .
        ?film onto:starring ?actors .
        ?actors foaf:homepage ?uri .
}