About: http://webisa.webdatacommons.org/153580170

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	It makes most sense to me to doing a set, rather than an add, particularly if there is a test-and-set instruction or implementation.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com