Question: At what {point in time} did {Long Island} have a {population} of {2,098,460}?
Paraphrase: When did Long Island have a population of 2,098,460?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q18438 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '2098460')) . ?s pq:P585 ?value}