What is the {group} for {has cause} of {Congress of Vienna}
Which group made the Congress of Vienna?
Which is the group that caused the Congress of Vienna?
SELECT DISTINCT ?x WHERE { ?x rdf:type ontology:group . ?x property:has_cause resource:Congress_of_Vienna }
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/Q16887380> } 
 select distinct ?sbj where { ?sbj wdt:P828 wd:Q46362 . ?sbj wdt:P31 wd:Q16887380 } 
Border Kingdom of Saxony-Kingdom of Prussia 1815 borderstones Belgium-Prussia