Question: How was Ceuta's population of 84180 determined?
Paraphrase: What census found the population of Ceuta to be 84180?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q5823 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '84180.0')) . ?s pq:P459 ?value}