About: http://webisa.webdatacommons.org/325652074

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	To position the patient's head, he or she may be instructed to look at a location, such as a mirror or point on a wall, that is disposed relatively horizontally from his or her head.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es