What is {population} of {Valparaíso Region} that is {determination method} is {census} ?
What was the census population method used to determine the Region of Valparaiso?
Which census population method was used to determine the Region of Valparaiso?
SELECT ?e WHERE { ?v property:population ?e . resource:Valparaíso_Region property:population ?v . ?v property:determination_method resource:census }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q219458> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1082> .
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?obj .
?statement <http://www.wikidata.org/entity/P459> <http://wikidata.dbpedia.org/resource/Q39825>
} 

SELECT ?obj WHERE { wd:Q219458 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P459 wd:Q39825 }