About: http://webisa.webdatacommons.org/203163972

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	Look for rings- the bottom shaft is 100% carbon, while the top two are a blend of carbon on the outside and glass on the inside, you can see the different colored rings, the top two have 30% to 50% carbon content.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com