About: http://webisa.webdatacommons.org/423834927

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	Typically, the outer tubular wall will comprise anchors, such as barbs or hooks, on its outer surface in order to penetrate the annulus upon expansion and immobilize the base portion therein.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com