About: http://webisa.webdatacommons.org/8587940

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 spherical ball may also be formed of any suitable material including metal, synthetic plastics material, wood or any other relatively rigid material which is able to block radiation emitted from a radiation emitter.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au