About: http://webisa.webdatacommons.org/173615443

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	Chinese emigrants to cities such as San Francisco, London, and New York brought with them the Chinese manner of opium smoking and the social traditions of the opium den.
http://www.w3.org/ns/prov#wasQuotedFrom	reference.com