About: http://webisa.webdatacommons.org/149454543

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	* *null_accepted*: If :data:`True` and the argument is a pointer it is safe to pass a :data:`NULL` as the value. Defaults to :data:`True`.
http://www.w3.org/ns/prov#wasQuotedFrom	bitbucket.org