what is the {point in time} for {Cologne} has {population} as {1.0817e+06} ?
When was the population of Cologne was 1.0817e+06?
At what point in history did Cologne have a population of 1.0817e+06?
SELECT ?g WHERE { ?i property:population ?h . ?i property:point_in_time ?g . resource:Cologne property:population ?i . FILTER ( ?h = 1.0817e+06 ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q365> .
?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> <1.0817e+06> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q365 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '1.0817e+06')) . ?s pq:P585 ?value}