Question: How many movies have a screenplay located in the States?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x onto:birthPlace <http://dbpedia.org/resource/United_States> . ?uri prop:screenplay ?x  . ?uri rdf:type onto:Film}