About: http://webisa.webdatacommons.org/283182011

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	The most common types of refractive errors are nearsightedness, farsightedness, astigmatism and presbyopia.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com