What is the {film trilogy} for {series} of {Star Wars Episode V: The Empire Strikes Back}
What trilogy was Star Wars Episode V: The Empire Strikes Back a part of?
 select distinct ?obj where { wd:Q181795 wdt:P179 ?obj . ?obj wdt:P31 wd:Q13593818 } 
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q181795> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P179> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj . ?obj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q13593818> } 
What set of three was Star Wars Scene V: The Realm Strikes Back a portion of?