About: http://webisa.webdatacommons.org/201842191

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	Erica Vetsch shared Five Fun Facts about Early Photography on a guest post she wrote for my blog, including more about the reasons for the sour expressions.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com