What is {country} of {Tyumen} that is {start time} is {1991-12-27} ?
On December 27, 1991, what country was Tyumen associated with?
what was the country of Tyumen in 1991-12-27
SELECT ?i WHERE { resource:Tyumen property:country ?p . ?p property:country ?i . ?p property:start_time ?w . FILTER ( CONTAINS ( YEAR ( ?w ) , '1991' ) ) }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q5815> .
?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> <1991-12-27>
} 

SELECT ?obj WHERE { wd:Q5815 p:P17 ?s . ?s ps:P17 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1991')) }