About: http://webisa.webdatacommons.org/273335092

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	The problems are or the problems still are but particularly were a reason for not changing the policy in time was that the alternatives are very costly.
http://www.w3.org/ns/prov#wasQuotedFrom	pbs.org