what is the {start time} for {Dmitry Medvedev} has {position held} as {First Deputy Chairman of the Government of the Russian Federation} ?
When did Dmitry Medvedev serve as the First Deputy Chairman of the Government of the Russian Federation?
When was Dmitry Medvedev the First Deputy Chairman of the Government of the Russian Federation?
SELECT ?a WHERE { ?p property:start_time ?a . resource:Dmitry_Medvedev property:position_held ?p . ?p property:position_held resource:First_Deputy_Chairman_of_the_Government_of_the_Russian_Federation }
select distinct ?value  where {
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?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P39> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q1965788> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q23530 p:P39 ?s . ?s ps:P39 wd:Q1965788 . ?s pq:P580 ?value}