About: http://webisa.webdatacommons.org/122979842

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	Over many years, different materials including precious metals, glass, ivory, Teflon and other synthetic materials have been tried and/or evaluated.
http://www.w3.org/ns/prov#wasQuotedFrom	arthritiseducation.com