What is the {revolution} for {cause of destruction} of {Russian Empire}
What revolution caused the destruction of the Russian Empire?
 select distinct ?obj where { wd:Q34266 wdt:P770 ?obj . ?obj wdt:P31 wd:Q10931 } 
select distinct ?obj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q34266> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P770> . ?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/Q10931> } 
Which revolution caused the destruction of the Russian Empire?