Question: Give me some TV stations whose network's main language is American English?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/language> <http://dbpedia.org/resource/American_English> . ?uri <http://dbpedia.org/property/network> ?x . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TelevisionStation>}