Question: Is Natalie Portman an actress?
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 onto: <http://dbpedia.org/ontology/>
ASK
WHERE 
{ 
	?subject rdf:type onto:Actor.
      	?subject rdfs:label 'Natalie Portman'@en.
}