About: http://webisa.webdatacommons.org/338788018

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	These cities were known as ???treaty ports,??? and the system by which Americans and other foreigners were exempt from Chinese law was called ???extraterritoriality.???
http://www.w3.org/ns/prov#wasQuotedFrom	historians.org