About: http://webisa.webdatacommons.org/308997255

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	This can be very useful when working with database null values being used in columns that have types such as int or DateTime.
http://www.w3.org/ns/prov#wasQuotedFrom	codeproject.com