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