Question: What was the population of Bonn as of December 31st, 1970?
Paraphrase: What was Bonn's population on December 31st, 1970?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q586 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1970')) }