Question: Where is the radio broadcasted in, whose sister station is CKFM-FM?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/sisterStation> <http://dbpedia.org/resource/CKFM-FM> . ?x <http://dbpedia.org/ontology/broadcastArea> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/RadioStation>}
Answer: The broadcast area of the radio station whose sister is CKFM-FM is [North America].