What is {country of citizenship} of {Robert Conquest} that is {end time} is {1927-4-12} ?
Which country was Robert Conquest, who died on 12th April, 1927,  a citizen of?
What country of citizenship Robert Conquest who died on 1927-4-12?
SELECT ?h WHERE { resource:Robert_Conquest property:country_of_citizenship ?m . ?m property:country_of_citizenship ?h . FILTER ( CONTAINS ( YEAR ( ?k ) , '1927' ) ) . ?m property:end_time ?k }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q379628> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P27> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P582> <1927-4-12>
} 

SELECT ?obj WHERE { wd:Q379628 p:P27 ?s . ?s ps:P27 ?obj . ?s pq:P582 ?x filter(contains(YEAR(?x),'1927')) }