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