what is the {start time} for {Oulu} has {head of government} as {Ilmo Paananen} ?
Which year did Oulu begin serving as the head of government for Ilmo Paananen?
When did Oulu begin serving as the head of government for Ilmo Paananen?
SELECT ?i WHERE { ?k property:head_of_government resource:Ilmo_Paananen . ?k property:start_time ?i . resource:Oulu property:head_of_government ?k }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q47048> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P6> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q6031942> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q47048 p:P6 ?s . ?s ps:P6 wd:Q6031942 . ?s pq:P580 ?value}