Who composed the episode after which came Butter's Very own Episode?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/subsequentWork> <http://dbpedia.org/resource/Butters'_Very_Own_Episode> . ?x <http://dbpedia.org/ontology/musicComposer> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TelevisionEpisode>}
Butters'_Very_Own_Episode