what is the {start time} for {Alexander Karelin} has {country of citizenship} as {Russia} ?
What year did Alexander Karelin become a Russian citizen?
When was Alexander Karelin become the citizen of Russia?
SELECT ?z WHERE { ?e property:start_time ?z . ?e property:country_of_citizenship resource:Russia . resource:Alexander_Karelin property:country_of_citizenship ?e }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q187247> .
?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> <http://wikidata.dbpedia.org/resource/Q159> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q187247 p:P27 ?s . ?s ps:P27 wd:Q159 . ?s pq:P580 ?value}