Question: In how many different places have US people died?
SPARQL:
SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/placeOfBirth> <http://dbpedia.org/resource/United_States> . ?x <http://dbpedia.org/ontology/deathPlace> ?uri  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Location>}