What is {population} of {Los Lagos Region} that is {determination method} is {census} ?
What did the census determine is the population of the Los Lagos Region?
What is {population} of {Los Lagos Region} where {determination method} is {census} ?
SELECT ?m WHERE { resource:Los_Lagos_Region property:population ?i . ?i property:determination_method resource:census . ?i property:population ?m }
select distinct ?obj  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q2178> .
?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:Q2178 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P459 wd:Q39825 }