what is the {point in time} for {Long Island} has {population} as {2098460} ?
When did Long Island have a population of 2,098,460?
At what {point in time} did {Long Island} have a {population} of {2,098,460}?
SELECT ?j WHERE { resource:Long_Island property:population ?m . ?m property:point_in_time ?j . ?m property:population ?x . FILTER ( CONTAINS ( ?x , '2098460' ) ) }
select distinct ?value  where {
?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q18438> .
?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> <2098460> .
?statement <http://www.wikidata.org/entity/P585> ?value. 
} 

SELECT ?value WHERE { wd:Q18438 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '2098460')) . ?s pq:P585 ?value}