what is the {point in time} for {Monaco} has {population} as {25809.0} ?
What is the date that 25,809 people lived in Monaco?
At what point in time did Monaco have a population of 25809?
SELECT ?k WHERE { ?r property:population ?x . FILTER ( CONTAINS ( ?x , '25809.0' ) ) . ?r property:point_in_time ?k . resource:Monaco property:population ?r }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q235> .
?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> <25809.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q235 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '25809.0')) . ?s pq:P585 ?value}