what is the {start time} for {Jinju} has {twinned administrative body} as {Omsk} ?
Jinju was twinned with Omsk on what date?
Since when was Jinju twinned with Omsk?
SELECT ?r WHERE { ?w property:twinned_administrative_body resource:Omsk . ?w property:start_time ?r . resource:Jinju property:twinned_administrative_body ?w }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q42144> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P190> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q898> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q42144 p:P190 ?s . ?s ps:P190 wd:Q898 . ?s pq:P580 ?value}