About: http://webisa.webdatacommons.org/438051522

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	Although eyesight is measured in numbers such as 20/20, 20/100 and 20/200, these measurements are not exact.
http://www.w3.org/ns/prov#wasQuotedFrom	covingtonhistory.co.uk