What is {country} of {Kherson Oblast} that is {start time} is {1919-3-10} ?
Was Kherson Oblast part of Ukraine on 3-10-1919?
SELECT ?obj WHERE { wd:Q163271 p:P17 ?s . ?s ps:P17 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1919')) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q163271> .
?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> <1919-3-10>
} 

On 3-10-1919 was Kherson Oblast a citizen of Ukrane?