About: http://webisa.webdatacommons.org/384576632

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	It has been established that when a person passes from the state of using distant vision to the state of using near vision, for example to read or write, the head is tilted at an angle on the order of 50??? to 60???.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com