what is the {end time} for {Kim Jong-il} has {spouse} as {Kim Young-sook} ?
When did Kim Jong-il’s wife Kim Young-sook die?
SELECT ?value WHERE { wd:Q10665 p:P26 ?s . ?s ps:P26 wd:Q714481 . ?s pq:P582 ?value}
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q10665> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P26> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q714481> .
?statement <http://www.wikidata.org/entity/P582> ?value. 
} 

What is the date of death for Kim Young-sook, the wife of Kim Jong-il?