what is the {point in time} for {Yugoslavia} has {basic form of government} as {monarchy} ?
When did Yugoslavia have a monarchy as a basic form of government?
SELECT ?value WHERE { wd:Q36704 p:P122 ?s . ?s ps:P122 wd:Q7269 . ?s pq:P585 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q36704> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P122> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q7269> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

At what point in time did Yugoslavia begin monarchism as a basic form of government