About: http://webisa.webdatacommons.org/17063063

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	A number of built-in validators exist for common tasks, such as validation of strings, numbers, timestamps, e-mail addresses, and files.
http://www.w3.org/ns/prov#wasQuotedFrom	ibm.com