About: http://webisa.webdatacommons.org/214804670

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	The ball element 600 is preferably made of a relatively inexpensive and rigid material, such as a glass or mineral filled acetal copolymer, or alternatively could be fabricated of stainless steel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr