About: http://webisa.webdatacommons.org/167199891

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	A viewing instrument, typically including a miniature video carmera, or optical telescope is inserted through one of these cannulas and a variety of surgical instruments and refractors are inserted through others.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca