Question: where are the sister stations of CFRB broadcasted?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/sisterStations> <http://dbpedia.org/resource/CFRB> . ?x <http://dbpedia.org/ontology/broadcastArea> ?uri  . }
Answer: The broadcast area of the radio station whose sister station is CFRB is [North America].