what is the {point in time} for {Western Australia} has {population} as {2.5656e+06} ?
What year was the population of Western Australia 2.5656 million?
When was the population of Western Australia 2.5656 million?
SELECT ?a WHERE { FILTER ( ?w = 2.5656e+06 ) . resource:Western_Australia property:population ?g . ?g property:population ?w . ?g property:point_in_time ?a }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q3206> .
?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> <2.5656e+06> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q3206 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '2.5656e+06')) . ?s pq:P585 ?value}