About: http://webisa.webdatacommons.org/351481500

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	Referring to FIGS. 2, 3, and 4, the disk 2 is formed of a strong, dense material such as steel or another metal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com