what is the {point in time} for {Oslo} has {population} as {623966.0} ?
Oslo's population was 623966 at what time?
When did Oslo have a population of 623966?
SELECT ?t WHERE { FILTER ( CONTAINS ( ?u , '623966.0' ) ) . ?q property:point_in_time ?t . resource:Oslo property:population ?q . ?q property:population ?u }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q585> .
?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> <623966.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q585 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '623966.0')) . ?s pq:P585 ?value}