About: http://webisa.webdatacommons.org/19615386

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	Considering that an optical fiber made of other materials than quartz is impractical in view of loss of light in transmission, it is practically impossible to use any optical fibers made of a material other than quartz.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com