About: http://webisa.webdatacommons.org/101624256

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, the ball, cover and pad may also be made from other metals or other conducting materials.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com