what is the {point in time} for {Łódź} has {population} as {452000.0} ?
At what point in time did Lodz have a population of 45,200?
What is the {point in time} {Lodz} had a {population} of {45200.0}?
SELECT ?g WHERE { resource:Łódź property:population ?w . ?w property:point_in_time ?g . ?w property:population ?p . FILTER ( ?p = 452000.0 ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q580> .
?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> <452000.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q580 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '452000.0')) . ?s pq:P585 ?value}