Question: What was the population of Kiel on December 31st, 2015?
Paraphrase: which population of kiel on december 31st,2015?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q1707 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'2015')) }