What is {country} of {Jiangsu} that is {start time} is {1949-10-1} ?
What nation was Jiangsu a piece of in October 1949?
What country was Jiangsu a part of in October 1949?
SELECT ?j WHERE { resource:Jiangsu property:country ?m . ?m property:country ?j . FILTER ( CONTAINS ( YEAR ( ?k ) , '1949' ) ) . ?m property:start_time ?k }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q16963> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P17> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P580> <1949-10-1>
} 

SELECT ?obj WHERE { wd:Q16963 p:P17 ?s . ?s ps:P17 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1949')) }