what is the {point in time} for {Szczecin} has {population} as {407811.0} ?
What is the population in Szezecin?
Is the population in Szezecin 407811.0?
SELECT ?a WHERE { ?m property:population ?a . ?m property:point_in_time ?a . resource:Szczecin property:population ?m . FILTER ( ?a = 407811.0 ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q393> .
?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> <407811.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q393 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '407811.0')) . ?s pq:P585 ?value}