About: http://webisa.webdatacommons.org/3339717

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	If you can not find a label or other info, rub the broken piece on some sandpaper, if the dust is black it is carbon / graphite, if white it is fiberglass.
http://www.w3.org/ns/prov#wasQuotedFrom	gwtwforum.com