About: http://webisa.webdatacommons.org/357921003

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	extend ActiveRecord validations by checking if a string is a valid email address
http://www.w3.org/ns/prov#wasQuotedFrom	rubygems.org