What is the {opera} for {composer} of {Pyotr Ilyich Tchaikovsky}
What musical drama was composed by Pyotr Ilyich Tchaikovsky?
What opera was composed by Pyotr Ilyich Tchaikovsky?
SELECT DISTINCT ?p WHERE { ?p rdf:type ontology:opera . ?p property:composer resource:Pyotr_Ilyich_Tchaikovsky }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P86> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q7315> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q1344> } 
 select distinct ?sbj where { ?sbj wdt:P86 wd:Q7315 . ?sbj wdt:P31 wd:Q1344 } 
The Queen of Spades Cherevichki The Enchantress Vakula the Smith The Maid of Orleans Iolanta Mazeppa The Oprichnik The Voyevoda Undina The Queen of Spades Eugene Onegin