Question: What is the population of Zaragoza whose determination method is register office?
Paraphrase: According to the registered office's determination method, what is Zaragoza's population?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q10305 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P459 wd:Q745221 }