Question: Give me all Argentine films.
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX yago: <http://dbpedia.org/class/yago/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
SELECT DISTINCT ?uri ?string WHERE
{
        { ?uri rdf:type yago:ArgentineFilms . }
        UNION
	{ ?uri rdf:type onto:Film .
	{ ?uri onto:country res:Argentina . } UNION { ?uri prop:country 'Argentina'@en . } }
	OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') }
}