About: http://webisa.webdatacommons.org/331001914

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	Ceramics or hard and refractory metals such as W and Ta are useful core materials for rigidity and heat resistance, while soft metals such as Au and Pb are useful to provide some yielding to relieve thermal or mechanical stresses.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com