About: http://webisa.webdatacommons.org/426080091

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 core of the optical fibre is surrounded by a similar material, i.e. glass or silica, called the cladding, that has a refractive index that is slightly lower than that of the core.
http://www.w3.org/ns/prov#wasQuotedFrom	radio-electronics.com