Question: Which are the previous broadcast networks of sister channels of WGBC?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/WGBC_(DT2)> <http://dbpedia.org/property/sisterStations> ?x . ?x <http://dbpedia.org/ontology/formerBroadcastNetwork> ?uri  . }
Answer: The former broadcast networks of the sister stations of WGBC are [WANN-CD, The CW, NBC, National Football League, American Broadcasting Company, Fox Broadcasting Company, WTVA].