About: http://webisa.webdatacommons.org/403576076

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	For convenience, the plane is often a vertical one, and can be laterally located by reference to anatomical features near the surgical site, and its angular orientation determined with a bubble or other level.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com