Question: At what point in time did Northern England have a population of 14933000?
Paraphrase: When did Northern England have a population of 14933000?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q1788657 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '14933000')) . ?s pq:P585 ?value}