About: http://webisa.webdatacommons.org/43029250

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 may seem hard to believe, but there was a time when eyeglasses actually were made of glass.
http://www.w3.org/ns/prov#wasQuotedFrom	howstuffworks.com