what is the {point in time} for {Central Bohemian Region} has {population} as {1.3153e+06} ?
The Central Bohemian Region attained a population of 1.3 million in what year?
When did the Central Bohemian Region reach a population of 1.3 million?
SELECT ?b WHERE { ?y property:population ?y . ?y property:point_in_time ?b . FILTER ( ?y = 1.3153e+06 ) . resource:Central_Bohemian_Region property:population ?y }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q188399> .
?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> <1.3153e+06> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q188399 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '1.3153e+06')) . ?s pq:P585 ?value}