About: http://webisa.webdatacommons.org/400972061

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 grafts may also be affixed to vessels with hooks or barbs. [0004] The grafts may be formed from synthetic materials, such as polyester, expanded polytetraflouroethylene (???ePTFE???), or others.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au