Question: What ethnicity do people in British Columbia belong to?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/residence> <http://dbpedia.org/resource/British_Columbia> . ?x <http://dbpedia.org/ontology/ethnicity> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Person>}