About: http://webisa.webdatacommons.org/62473107

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	Redefining NULL is a very bad thing to do, but sometimes programmers do bad things.
http://www.w3.org/ns/prov#wasQuotedFrom	tutsplus.com