List all areas served by the radio station serving South carolina ?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/area> <http://dbpedia.org/resource/South_Carolina> . ?x <http://dbpedia.org/property/area> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/RadioStation>}
South_Carolina