what is the {start time} for {Marche} has {head of government} as {Luca Ceriscioli} ?
Marche's Head of Goverment was Luca Ceriscioli during what period?
When was Luca Ceriscioli the head of government for Marche?
SELECT ?c WHERE { ?v property:start_time ?c . ?v property:head_of_government resource:Luca_Ceriscioli . resource:Marche property:head_of_government ?v }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q1279> .
?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/Q3838079> .
?statement <http://www.wikidata.org/entity/P580> ?value. 
} 

SELECT ?value WHERE { wd:Q1279 p:P6 ?s . ?s ps:P6 wd:Q3838079 . ?s pq:P580 ?value}