About: http://webisa.webdatacommons.org/377973152

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	By the end of that episode users who had already signed in with a username and password could also authenticate via third-party services such as Twitter.
http://www.w3.org/ns/prov#wasQuotedFrom	asciicasts.com