About: http://webisa.webdatacommons.org/188018391

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	You would need to hash the source first to ensure you are not copying a duplicate to the remote.So yeah, your best options are to either dedupe on one end or the other, or roll your own solution.
http://www.w3.org/ns/prov#wasQuotedFrom	arstechnica.com