what is the {point in time} for {Newfoundland and Labrador} has {population} as {519716.0} ?
What year did Labrador and Newfoundland have 519716 citizens?
When did Newfoundland and Labrador have a population of 519716 people?
SELECT ?i WHERE { ?l property:population ?l . resource:Newfoundland_and_Labrador property:population ?l . FILTER ( CONTAINS ( ?l , '519716.0' ) ) . ?l property:point_in_time ?i }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q2003> .
?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> <519716.0> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q2003 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '519716.0')) . ?s pq:P585 ?value}