About: http://webisa.webdatacommons.org/166592015

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 lens 1, including the optic 4, haptics 2, and loops 5 is preferably formed of a semi-rigid material such as silicone, acrylic, or hydrogel, and particularly a material that does not fracture with time.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com