About: http://webisa.webdatacommons.org/180963144

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	Their visit was a response to the late Commodore Matthew Calbraith Perry???s 1852???54 expedition to Japan and the resulting treaty that opened trade with the United States.
http://www.w3.org/ns/prov#wasQuotedFrom	whitehousehistory.org