About: http://webisa.webdatacommons.org/170969054

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 hard lenses most commonly used today are rigid gas-permeable, or RGP. They are made of plastics and other materials such as silicone or fluoropolymers.
http://www.w3.org/ns/prov#wasQuotedFrom	drtonyseyehospital.com