Question: When did Oberhausen have a population of 209292.0?
Paraphrase: The population in Oberhausen reached 209292.0 in what year?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q2838 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '209292.0')) . ?s pq:P585 ?value}