what is the {point in time} for {Bank of China} has {owned by} as {National Council for Social Security Fund} ?
when s the {point in time} for {Bank of China} has {owned by} as {National Council for Social Security Fund} ?
SELECT ?value WHERE { wd:Q790068 p:P127 ?s . ?s ps:P127 wd:Q6971896 . ?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/Q790068> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P127> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q6971896> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

At what time was Bank of China owned as National Council for Social Security Fund?