what is the {point in time} for {New Hampshire} has {population} as {491524.0} ?
What date was New Hampshire population of 491524 determined?
When did New Hampshire have a population of 491524?
SELECT ?f WHERE { ?b property:population ?a . resource:New_Hampshire property:population ?b . ?b property:point_in_time ?f . FILTER ( CONTAINS ( ?a , '491524.0' ) ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q759> .
?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> <491524.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q759 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '491524.0')) . ?s pq:P585 ?value}