About: http://webisa.webdatacommons.org/430758308

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	Implants, such as fusion devices, screws, plates, rods, artificial discs, bone growth material, and other repair devices or therapeutic substances can be delivered through retractor 320 to the desired site in the patient's body.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk