Question: What was the population of Navotas, on January 1, 1939?
Paraphrase: As of January 1, 1939, what was the total population of Navotas?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q17179 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1939')) }