Question: Which TV show's company is PlayTone and is produced by Stephen E. Ambrose ?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/company> <http://dbpedia.org/resource/Playtone> . ?uri <http://dbpedia.org/property/producer> <http://dbpedia.org/resource/Stephen_E._Ambrose>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TelevisionShow>}