what is the {point in time} for {Turku} has {population} as {159180.0} ?
Turku had 159,180 people at which period of time?
When did Turku have the population of 159180?
SELECT ?i WHERE { ?o property:population ?k . FILTER ( ?k = 159180.0 ) . ?o property:point_in_time ?i . resource:Turku property:population ?o }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q38511> .
?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> <159180.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q38511 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '159180.0')) . ?s pq:P585 ?value}