About: http://webisa.webdatacommons.org/384064050

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	These light sources can send light outward as for example along a path represented by a dashed line 54 to be reflected off of a reflective optically detectable object such the marker 24 on the patient's body 22.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk