About: http://webisa.webdatacommons.org/405147860

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	Opticians convert a prescription for the correction of a refractive error into an ophthalmic lens or some other device, such as reading aids or telescopic lenses.[4][5][6]
http://www.w3.org/ns/prov#wasQuotedFrom	wikipedia.org