About: http://webisa.webdatacommons.org/67041363

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	in Chinese history, the traffic that developed in the 18th and 19th centuries in which Western nations, mostly Great Britain, exported opium grown in India and sold it to China.
http://www.w3.org/ns/prov#wasQuotedFrom	britannica.com