About: http://webisa.webdatacommons.org/55200359

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	This simulates a hard structure, such as bone, which the needle cannot advance through, and makes it apparent to the user that the needle must be retracted.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com