What is the {political border} for {has cause} of {Congress of Vienna}
Which is the political border Congress of Vienna have cause?
What political border does the Congress of Vienna have cause to be interested in?
SELECT DISTINCT ?q WHERE { ?q property:has_cause resource:Congress_of_Vienna . ?q rdf:type ontology:political_border }
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/P828> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q46362> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q1292279> } 
 select distinct ?sbj where { ?sbj wdt:P828 wd:Q46362 . ?sbj wdt:P31 wd:Q1292279 } 
Border Kingdom of Saxony-Kingdom of Prussia 1815