Question: Who is starring in Spanish movies produced by Benicio del Toro?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX onto: <http://dbpedia.org/ontology/> 
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
PREFIX prop: <http://dbpedia.org/property/> 
SELECT DISTINCT ?uri 
WHERE {  
   ?film rdf:type onto:Film . 
   ?film onto:country res:Spain . 
   ?film onto:producer res:Benicio_del_Toro . 
   ?film onto:starring ?uri . 
   ?uri rdf:type onto:Person .  
}