About: http://webisa.webdatacommons.org/68922509

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	However, other materials such as chromium (Cr), molybdenum (Mo), tantalum (Ta), titanium (Ti), and mixtures thereof may also be employed.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com