Question: When did North Carolina have a population of 3,170,280?
Paraphrase: At which time did North Carolina's population reach 3,170,280?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q1454 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '3.17028e+06')) . ?s pq:P585 ?value}